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 A135442 #2 Apr 19 2016 01:16:09 %S A135442 4,328 %N A135442 Number of partitions into "bus routes" of n X n grid. %C A135442 1. One and only one route exists on all edges of G %C A135442 2. Terminals of two different routes don't meet on the same point %Y A135442 Cf. A131709. %K A135442 nonn,more,bref %O A135442 1,1 %A A135442 _Yasutoshi Kohmoto_, Feb 18 2008