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 A136732 #2 Mar 30 2012 18:37:09 %S A136732 1,3,9,43,324,3510,50528,913377,19918602,509040779,14918466255, %T A136732 493115508126,18143982947900,735340631600946,32542320101428755, %U A136732 1561227609244084205,80700623119099359600,4470904603875492038790 %N A136732 Column 2 of square array A136730. %Y A136732 Cf. A136730; A101482, A136731. %K A136732 nonn %O A136732 0,2 %A A136732 _Paul D. Hanna_, Jan 19 2008