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 A134262 #4 Mar 31 2012 12:35:06 %S A134262 1,10,250,22946,8222576,11168045764,57451983566596, %T A134262 1121231537486377866,82999668877677132763564, %U A134262 23304040481827726137141908956,24817820869161647380317564563160782 %N A134262 Number of n X n binary matrices with every 1 adjacent to another 1 horizontally or vertically. %K A134262 nonn %O A134262 1,2 %A A134262 _R. H. Hardin_, Jan 14 2008