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 A294961 #14 Apr 15 2018 13:40:09 %S A294961 2,6,6,6,6,18,6,18,18,18,6,18,30,18,30,54,18,42,30,42,18,42,42,54,66 %N A294961 a(n) is the number of E-toothpicks added at n-th stage in the structure of the snowflake cellular automaton of A294960. %H A294961 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 A294961 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A294961 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %Y A294961 First differences of A294960. %Y A294961 Cf. A139251, A161328, A161329, A161330, A161331. %K A294961 nonn,more %O A294961 1,1 %A A294961 _Omar E. Pol_, Feb 10 2018