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 A296611 #20 Apr 11 2019 22:47:44 %S A296611 1,1,1,1,1,2,3,3,2,3,3,4,6,5,2,3,3,4,6,7,6,8,5,8,12,10,3,3,3,4,6,7,6, %T A296611 8,7,10,16,16,11,10,5,8,12,16,15,19,11,19,26,21,6,3,3,4,6,7,6,8,7,10, %U A296611 16,16,11,10,7,10,16,20,21,26,20,25,34,36,24,16,6,8,12,16,15,19,17,25 %N A296611 Number of toothpicks added at n-th stage to the toothpick structure of A296610. %C A296611 The word of this cellular automaton is "abc", the same as the word of A296511, but here the irregular triangle starts with three rows of length 3 as shown below: %C A296611 a,b,c; %C A296611 a,b,c; %C A296611 a,b,c; %C A296611 a,b,c,a,b,c; %C A296611 a,b,c,a,b,c,a,b,c,a,b,c; %C A296611 a,b,c,a,b,c,a,b,c,a,b,c,a,b,c,a,b,c,a,b,c,a,b,c; %C A296611 ... %C A296611 Row lengths are 3, 3, 3, 6, 12, 24, 48, 96, ... or in other words: 3 together with the column 3 of A296612. %C A296611 See also the example. %H A296611 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 A296611 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A296611 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %e A296611 Triangle begins: %e A296611 1,1,1; %e A296611 1,1,2; %e A296611 3,3,2; %e A296611 3,3,4,6,5,2; %e A296611 3,3,4,6,7,6,8,5, 8,12,10, 3; %e A296611 3,3,4,6,7,6,8,7,10,16,16,11,10,5, 8,12,16,15,19,11,19,26,21, 6; %e A296611 3,3,4,6,7,6,8,7,10,16,16,11,10,7,10,16,20,21,26,20,25,34,36,24,16,6,8,12,16, ... %e A296611 ... %Y A296611 Cf. A139251, A296511, A296610, A296612. %K A296611 nonn,tabf %O A296611 1,6 %A A296611 _Omar E. Pol_, Mar 02 2019