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 A048709 #6 Jul 10 2011 18:19:25 %S A048709 1,27,325,7607,69649,1749419,22103317,476952263,4311744769, %T A048709 116417108763,1392727114821,32619053820599,300171238899985, %U A048709 7506480532757163,94597931458646037,2049660569696039367 %N A048709 Main diagonal of Family 1 "Rule 90 x Rule 150" array. %C A048709 The successive generations of one-dimensional cellular automata rule (k=1,r=2) 1721342310 (hex 66999966) starting from the seed pattern 1. %H A048709 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %Y A048709 A038183, A038184 give the first row and column of Family 1. Cf. A048705. %K A048709 nonn %O A048709 0,2 %A A048709 Antti Karttunen, Mar 09 1999