Contents: Conference appearances **|** Seminar talks **|** Workshops and discussions **|** Lecture series

- "The lexicographically least 5/4-power-free word on
**Z**_{≥ 0}", AMS Special Session on Sequences, Words, and Automata, Joint Mathematics Meetings, Denver, CO (2020–1–15). paper - "Restricted Lucas congruences for Apéry numbers modulo
*p*^{2}", AMS Special Session on Experimental Mathematics in Number Theory and Combinatorics, AMS Fall Southeastern Sectional Meeting, Gainesville, FL (2019–11–2). abstract | paper - "IntegerSequences: a package for computing with
*k*-regular sequences", Session on Symbolic Combinatorics, International Congress on Mathematical Software, University of Notre Dame, South Bend, IN (2018–7–27). demo notebook | abstract | paper | package: IntegerSequences - "Automatic sequences and
*p*-adic asymptotics", Minisymposium on Open Problems in Combinatorics on Words, SIAM Conference on Discrete Mathematics, University of Colorado, Denver, CO (2018–6–7). abstract - "Enumeration of binomial coefficients by their
*p*-adic valuations", Combinatorial and Additive Number Theory, CUNY Graduate Center, New York, NY (2018–5–25). paper - "Enumeration of binomial coefficients by their
*p*-adic valuations", AMS Special Session on Applied and Computational Combinatorics, Joint Mathematics Meetings, San Diego, CA (2018–1–10). abstract | paper - "Binomial coefficients, valuations, and words", Developments in Language Theory, Université de Liège, Belgium (2017–8–11). paper
- "Automatic proofs for establishing the structure of integer sequences avoiding a pattern", Session on Algorithmic Combinatorics, Applications of Computer Algebra, Jerusalem College of Technology, Jerusalem, Israel (2017–7–20). abstract | paper
- "
*p*-adic asymptotic properties of integer sequences", Special Session on Asymptotic Properties of Discrete Dynamical Systems, AMS Spring Eastern Sectional Meeting, Hunter College, CUNY, New York, NY (2017–5–6). abstract | paper - "Computing a finite automaton for an integer sequence modulo
*p*^{α}", Bridges Between Automatic Sequences, Algebra, and Number Theory, CRM, Montréal, QC (2017–4–27). paper - "Congruences for diagonals of rational power series", Joint Mathematics Meetings, Seattle, WA (2016–1–7). abstract | paper
- "Computing congruences for combinatorial sequences", Minisymposium on Symbolic Combinatorics, SIAM Conference on Applied Algebraic Geometry, NIMS, Daejeon, South Korea (2015–8–6). paper
- "
*p*-adic valuations of polynomials", Discrete Mathematics Day, Université de Liège, Belgium (2015–1–8). paper - "Avoiding fractional powers over the natural numbers", Special Session on Symbolic Dynamics and Combinatorics on Words, AMS Fall Eastern Sectional Meeting, Halifax, NS (2014–10–19). abstract | paper
- "Can we find sequences without knowing any terms?: Bringing structured data to more of the OEIS", Challenges of Identifying Integer Sequences, Rutgers University, Piscataway, NJ (2014–10–10).
- "Avoiding fractional powers over the natural numbers", Journées Montoises d'Informatique Théorique, Nancy, France (2014–9–24). paper
- "A new characterization of
*p*-automatic sequences", Challenges in Combinatorics on Words, Fields Institute, Toronto, ON (2013–4–26). paper - "Distinguished equivalence classes of words in
*F*_{2}", AMS Special Session on Algorithmic Problems of Group Theory and Their Complexity, Joint Mathematics Meetings, San Diego, CA (2013–1–9). abstract | paper - "Morphic words governing the boundaries of cellular automata", ISM Quebec Student Conference, UQAM, Montréal, QC (2012–6–1). paper
- "Morphic words governing the boundaries of cellular automata", Combinatorics, Automata, and Number Theory, Marseille, France (2012–5–23). abstract | paper
- "
*k*-automatic sets of rational numbers", Language and Automata Theory and Applications, A Coruña, Spain (2012–3–5). paper - "Counting equivalence classes of words in
*F*_{2}", Outstanding Challenges in Combinatorics on Words, Banff, AB (2012–2–20). paper - "Growth of one-dimensional cellular automata", Joint Mathematics Meetings, Boston, MA (2012–1–6). abstract | paper
- "Pattern avoidance in binary trees", Permutation Patterns, California Polytechnic State University, San Luis Obispo, CA (2011–6–22). paper
- "Toward a language theoretic proof of the four color theorem", AMS Special Session on New Topics in Graph Theory, Joint Mathematics Meetings, New Orleans, LA (2011–1–8). abstract | paper
- "Ambiguity in a certain context-free grammar", Mini-Workshop: Combinatorics on Words, Oberwolfach, Germany (2010–8–27). paper
- "Two binomial coefficient conjectures", From
*A*=*B*to*Z*=60, Piscataway, NJ (2010–5–27). abstract | video part 1 | video part 2 | paper - "Wolfram|Alpha: Inside and Out" (Keynote), Indiana MAA Spring Meeting, Franklin College, Franklin, IN (2010–4–10). abstract
- "The number of nonzero binomial coefficients modulo
*p*^{α}", Joint Mathematics Meetings, San Francisco, CA (2010–1–14). abstract | paper - "Pattern avoidance in binary trees", Joint Mathematics Meetings, Washington, DC (2009–1–5). abstract | paper
- "Regularity vs. complexity in the binary representation of 3
^{n}", Midwest NKS Conference, University of Indiana, Bloomington, IN (2008–10–31). paper - "A simple prime-generating recurrence", Joint Mathematics Meetings, San Diego, CA (2008–1–6). abstract | paper
- "Numbers as programs: the power of digit sequences", NKS2007 Conference, University of Vermont, Burlington, VT (2007–7–14). abstract
- "Classifying nestedness in cellular automata", NKS2006 Conference, Washington, DC (2006–6–17). abstract
- "The right side of rule 30", Midwest NKS Conference, University of Indiana, Bloomington, IN (2005–10–28). abstract | paper
- "The Fibonacci sequence and binomial coefficients mod
*n*", NKS2004 Conference, Boston, MA (2004–4–25). abstract - "On equivalent words in the free group on two generators", Undergraduate poster session, Joint Mathematics Meetings, Baltimore, MD (2003–1–17). paper

- "Extremal sequences avoiding a fractional power", New York Combinatorics Seminar, CUNY Graduate Center, New York, NY (2018–12–7). paper
- "Enumeration of binomial coefficients by their
*p*-adic valuations", Séminaire de Combinatoire et d'Informatique Mathématique du LaCIM, UQAM, Montréal, QC (2018–4–20). paper - "Formulas for primes", Seminar, Hofstra University, Hempstead, NY (2018–2–14).
- "Binomial coefficients and
*k*-regular sequences", New York Combinatorics Seminar, CUNY Graduate Center, New York, NY (2017–12–22). paper - "Avoiding repetitions in sequences of integers", Colloquium, Valparaiso University, Valparaiso, IN (2017–1–20). paper
- "Unanswered questions about the Fibonacci numbers", Seminar, Hofstra University, Hempstead, NY (2016–10–26). paper
- "Computer verification of integer sequences avoiding a pattern", Experimental Mathematics Seminar, Rutgers University, Piscataway, NJ (2016–9–29). video part 1 | video part 2 | paper
- "Arithmetic properties of some combinatorial sequences", Combinatorics Seminar, University of California, Los Angeles, CA (2016–2–11). paper
- "Extremal words avoiding partial repetitions", Colloquium, Tulane University, New Orleans, LA (2016–1–14). paper
- "Automatic sequences and transcendence", Discrete Mathematics Seminar, Université de Liège, Belgium (2015–3–12).
- "Formulas for primes", Comprehensible Seminar, Université de Liège, Belgium (2015–2–20).
- "Counting factors of automatic sequences up to abelian equivalence", Séminaire de Combinatoire du LaCIM, UQAM, Montréal, QC (2014–10–22). paper
- "Congruences for diagonals of rational power series", Number Theory Seminar, University of Illinois, Urbana-Champaign, IL (2014–10–16). abstract | paper
- "Congruences for combinatorial sequences", Discrete Mathematics Seminar, Université de Liège, Belgium (2014–2–12). paper
- "Congruences for combinatorial sequences", Séminaire de Combinatoire du LaCIM, UQAM, Montréal, QC (2013–11–1). paper
- "Congruences for algebraic sequences", Colloquium, Rutgers University, Piscataway, NJ (2013–9–27). video part 1 | video part 2 | paper
- "The structure of equivalence classes in
*F*_{2}", New York Applied Algebra Colloquium, CUNY Graduate Center, New York, NY (2013–4–12). paper - "A new characterization of
*p*-automatic sequences", Séminaire de Combinatoire du LaCIM, UQAM, Montréal, QC (2013–4–5). paper - "Formulas for primes", Trent University, Peterborough, ON (2012–12–5).
- "Column sequences of cellular automata", Mathematical Physics & Probability Seminar, University of California, Davis, CA (2012–10–24). paper
- "Constant-recursive sequences and a generalization", REU Seminar, Valparaiso University, Valparaiso, IN (2012–6–22).
- "Automated symbolic number theory", Experimental Mathematics Seminar, Rutgers University, Piscataway, NJ (2012–4–5). video part 1 | video part 2
- "Counting equivalence classes of words in
*F*_{2}", Séminaire de Combinatoire du LaCIM, UQAM, Montréal, QC (2012–3–16). paper - "The hierarchy of integer sequences", Séminaire CIRGET–LaCIM, UQAM, Montréal, QC (2012–3–1).
- "Words generated by cellular automata", Séminaire de Combinatoire du LaCIM, UQAM, Montréal, QC (2011–11–25). paper
- "A program for symbolic number theory", Languages and Automata Theory Seminar, University of Waterloo, Waterloo, ON (2011–11–14).
- "
*p*-adic valuations of integer sequences", Number Theory Seminar, University of Waterloo, Waterloo, ON (2011–11–10). - "Sequences arising from cellular automata", Languages and Automata Theory Seminar, University of Waterloo, Waterloo, ON (2011–9–26). paper
- "Regular sequences", RISC, Hagenberg, Austria (2011–9–8). abstract
- "Regular sequences", Algorithms Project Seminar, INRIA Rocquencourt, Le Chesnay, France (2011–9–5). abstract
- "Generating primes", REU Seminar, Valparaiso University, Valparaiso, IN (2011–7–8).
- "The crazy Thue–Morse sequence", REU Seminar, Valparaiso University, Valparaiso, IN (2010–6–17).
- "The crazy Thue–Morse sequence", Graduate Student Colloquium, Tulane University, New Orleans, LA (2009–9–22).
- "Formulas for primes", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2009–4–17).
- "Experimental methods applied to the computation of integer sequences" (thesis defense), Experimental Mathematics Seminar, Rutgers University, Piscataway, NJ (2009–4–2).
- "An introduction to generating functions, part 1", Graduate Combinatorics Seminar, Rutgers University, Piscataway, NJ (2009–1–28).
- "Pattern avoidance in binary trees", Graduate Combinatorics Seminar, Rutgers University, Piscataway, NJ (2008–10–1). paper
- "The crazy Thue–Morse sequence", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2008–2–29).
- "An introduction to cellular automata", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2006–10–18).
- "Calculus for a discrete world", Seminar, William Paterson University, Wayne, NJ (2006–4–5).
- "Nested structures in cellular automata", Experimental Mathematics Seminar, Rutgers University, Piscataway, NJ (2006–1–19).
- "Math 135 for a discrete world", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2005–10–19).
- "Pascal's triangle mod
*n*: fractal dimensions, fractal sequences, and other exotic cuisine", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2005–4–22). - "All about primitive Pythagorean triples", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2004–9–10).
- "On equivalent words in the free group of rank 2", Graduate Pizza Seminar, Rutgers University, Piscataway, NJ (2003–11–7). paper

- repetitions in words, Math Night, Henderson, NV (2013–8–25).
- paperfolding sequences, Round Table Discussion, Rutgers University, Piscataway, NJ (2009–4–22).
- Pythagorean triples, Round Table Discussion, Rutgers University, Piscataway, NJ (2009–3–4).
- bits of 3
^{n}, Round Table Discussion, Rutgers University, Piscataway, NJ (2009–2–11). paper - "Folding paper — dragon curves and fractals", Math Day, Princeton Friends School, Princeton, NJ (2008–11–15).
- cellular automata, Math Day, Princeton Friends School, Princeton, NJ (2008–11–15).
- Euler line, Round Table Discussion, Rutgers University, Piscataway, NJ (2008–10–28).
- Pythagorean triples, Experimental math undergraduate seminar (seventh (and partly the eighth) meeting), Rutgers University, Piscataway, NJ (2008–10–20).
- self-similar sequences, Round Table Discussion, Rutgers University, Piscataway, NJ (2008–9–30).
- cellular automata, guest "Problem of the Week" lecture, Princeton Friends School, Princeton, NJ (2005–4–29).

- Wolfram Summer School, Bentley University, Waltham, MA (summer 2016).
- Wolfram Summer School, Bentley University, Waltham, MA (summer 2015).
- MSRI-UP, Mathematical Sciences Research Institute, Berkeley, CA (summer 2014).
- Wolfram Science Summer School, Curry College, Milton, MA (summer 2012).
- NKS Summer School, University of Vermont, Burlington, VT (summer 2010).
- "Regular sequences", Tulane University, New Orleans, LA (April 2010).
- NKS Summer School, Istituto di Scienza e Tecnologie, Pisa (summer 2009).
- NKS Summer School, University of Vermont, Burlington, VT (summer 2008).
- NKS Summer School, University of Vermont, Burlington, VT (summer 2007).