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 A195645 #3 Sep 21 2011 22:02:24 %S A195645 1,2,6,16,50,144,462,1392,4356,14060,46310,146376 %N A195645 Erroneous version of A000136. %C A195645 Included in accordance with OEIS policy of including published but erroneous sequences, to serve as pointers to the correct versions. %D A195645 W. F. Lunnon, A map-folding problem, Math. Comp. 22 (1968), 193-199. %K A195645 dead %O A195645 1,2