G-Systems Theory of chord structures to create music through algorithms by Vladimir Ladma. http://www.sweb.cz/vladimir_ladma/english/music/articles/dide99.htm Sweb.cz~Site InfoWhoisTrace RouteRBL Check
Generating Functions Introduction to generating functions with interactive java applets by Alexander Bogomolny. http://www.cut-the-knot.org/blue/GeneratingFunctions.shtml Cut-the-knot.org~Site InfoWhoisTrace RouteRBL Check
Series Expansions Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities. http://www.ms.unimelb.edu.au/~iwan/Series.html Unimelb.edu.au~Site InfoWhoisTrace RouteRBL Check