* Binomial coefficients and Pascal's triangle

* Calculus of finite differences

* Fibonacci numbers and linear recurrences

* Rational and algebraic generating functions

* Continued fractions and continuants

* Catalan objects and lattice animals

* Transfer matrices

* Combinatorial reciprocity theorems

* q-enumeration and tiling

* Determinants and condensation, number walls, triangulations, and frieze patterns

* Signed enumeration and applications (the theorems of Vandermonde, Cayley-Hamilton, and Gessel-Viennot)

* Markoff numbers

* Somos sequences

Maintained by propp@math.wisc.edu.

*Last updated April 22, 2003.*