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 A161326 #6 Sep 26 2015 01:17:07 %S A161326 9,21,15,21,27,51,33,21,27,51,51,57,69,117,87,33,27,51,51,57,75,129, %T A161326 117,75,69,117,135 %N A161326 Sequence to which the rows of the triangle of A160121 converge. %H A161326 N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a> %Y A161326 Cf. A153001, A147646, A160121. %K A161326 more,nonn %O A161326 1,1 %A A161326 _Omar E. Pol_, Jun 18 2009