Resources for XULA Students
Resources for Math Majors and Math Enthusiasts
Open Math Notes - Free math notes hosted by the American Mathematical Society
Open Textbook Initiative - Free math textbooks curated by the American Institute of Mathematics
Collaborative Calculation and Data Science - The Sage cloud and more
Combinatorics Resources
Analysis of Algorithms - The international webpage for the AofA community
Links to Combinatorial Conferences - Maintained by Doug West
The On-Line Encyclopedia of Integer Sequences (OEIS) - Maintained by N. J. A. Sloane
Generatingfunctionology - Classic text by my academic grandfather
Analytic Combinatorics - The bible of the field
Math Problem Sites
Mathematical Reflections - Free online journal aimed at high school students and undergrads. Runs a problem column.
Ponder This - Monthly puzzle challenge from the IBM Research Labs in Haifa, Israel.
Miscellaneous Entertainment
Salty's Dream Cast Casino, better known as Salty Bet
Grown Up Rap - Notes from the intelligent side of hip-hop
Unkut.com - A tribute to ignorance