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 A104438 #3 May 20 2014 14:52:32 %S A104438 1,945,55,23,21,20,20,20,20,20,20,20,20,20,20 %N A104438 Number of ways to split 1, 2, 3, ..., 5n into 5 arithmetic progressions each with n terms. %Y A104438 Cf. A104429-A104437, A104439-A104443. %K A104438 nonn %O A104438 1,2 %A A104438 _Jonas Wallgren_, Mar 17 2005