This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A104436 #2 May 20 2014 14:52:32 %S A104436 1,15,5,4,4,4,4,4,4,4,4,4,4,4,4 %N A104436 Number of ways to split 1, 2, 3, ..., 3n into 3 arithmetic progressions each with n terms. %Y A104436 Cf. A104429-A104435, A104437-A104443. %K A104436 nonn %O A104436 1,2 %A A104436 _Jonas Wallgren_, Mar 17 2005