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 A151886 #12 Feb 24 2021 02:48:18 %S A151886 0,1,2,4,6,4,10,12,22,4,10,20,30,12,34,44,78,4,10,20,30,20,50,60,110, %T A151886 12,34,68,102,44,122,156,278,4,10,20,30,20,50,60,110,20,50,100,150,60, %U A151886 170,220,390,12,34,68,102,68,170 %N A151886 Number of toothpicks turned ON at generation n in A151885. %H A151886 Nathaniel Johnston, <a href="/A151886/b151886.txt">Table of n, a(n) for n = 0..926</a> %H A151886 David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="/A000695/a000695_1.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.] %H A151886 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 A151886 N. J. A. Sloane, <a href="/A151885/a151885.pdf">Illustration of first 8 generations</a> %Y A151886 Cf. A151885-A151888, A139250, A139251, A147562, A079314. %K A151886 nonn %O A151886 0,3 %A A151886 _N. J. A. Sloane_, Jul 23 2009 %E A151886 Terms after a(8) from _Nathaniel Johnston_, Apr 02 2011