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 A220527 #8 Mar 29 2013 12:27:51 %S A220527 0,1,2,4,4,4,4,7,8,4,4,8,12,14,12,15,16,4,4,8,12,16,10,24,26 %N A220527 Number of toothpicks or D-toothpicks added at n-th stage in the toothpick structure of A220526. %C A220527 Essentially the first differences of A220526. %H A220527 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 A220527 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %e A220527 Written as an irregular triangle begins: %e A220527 0; %e A220527 1; %e A220527 2; %e A220527 4,4; %e A220527 4,4,7,8; %e A220527 4,4,8,12,14,12,15,16; %e A220527 4,4,8,12,16,10,24,26,... %Y A220527 Cf. A139250, A139251, A194271, A194441, A194443, A220501, A220521, A220523, A220526. %K A220527 nonn,tabf,more %O A220527 0,3 %A A220527 _Omar E. Pol_, Jan 02 2013