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 A267695 #12 Dec 24 2018 03:25:18 %S A267695 0,2,3,4,7,4,7,12,15,4,7,12,15,12,23,36,31,4,7,12,15,12,23,36,31,12 %N A267695 First differences of A267694. %C A267695 Number of Q-toothpicks added at n-th stage to the Q-toothpick structure of A267694. %H A267695 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 A267695 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A267695 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %e A267695 When the positive terms are written as an irregular triangle in which the row lengths are the terms of A011782 the sequence begins: %e A267695 2; %e A267695 3; %e A267695 4, 7; %e A267695 4, 7, 12, 15; %e A267695 4, 7, 12, 15, 12, 23, 36, 31; %e A267695 4, 7, 12, 15, 12, 23, 36, 31, 12,... %Y A267695 Cf. A011782, A187210, A187211, A267694, A267699. %K A267695 nonn,tabf,more %O A267695 0,2 %A A267695 _Omar E. Pol_, Apr 02 2016