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 A159796 #10 Feb 24 2021 02:48:18 %S A159796 0,0,4,4,0,4,20,16,0,4,12,8,4,28,72,48,0,4,12,8,4,28,56,32,4,20,32,20, %T A159796 36,128,256,96,0,4,12,8,4,28,56,32,4,20,32,20,36,128,192,96,4,20 %N A159796 First differences of A159786. %H A159796 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 A159796 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> %Y A159796 Cf. A139250, A159786, A159789, A159799. %K A159796 more,nonn %O A159796 1,3 %A A159796 _Omar E. Pol_, Jun 13 2009 %E A159796 More terms from _Colin Barker_, Apr 19 2015