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 A194283 #29 Sep 26 2015 01:17:13 %S A194283 4,5,6,7,8,9,10,11,13,14,16,21 %N A194283 Numbers n such that at stage n of A194270 appears for first time a new distinct polygonal shape in the structure. %C A194283 This sequence contains at least 25 terms. The last term is > 200, if this sequence is finite. See also A194277. %C A194283 For more information about the polygonal shapes in the structure of A194270 see A194276 and A194278. %H A194283 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> %H A194283 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %Y A194283 Cf. A194270, A194276, A194277, A194278, A194440, A194442 %K A194283 nonn,hard,more %O A194283 1,1 %A A194283 _Omar E. Pol_, Sep 02 2011