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 A160735 #6 Feb 24 2021 02:48:18 %S A160735 1,2,2,1,2,3,2,2,4,6,5,3,5,5,2,2,4 %N A160735 First differences of A160734. %H A160735 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 A160735 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 A160735 Cf. A139251, A152978, A160158, A160162, A160734. %K A160735 more,nonn %O A160735 1,2 %A A160735 _Omar E. Pol_, Jun 10 2009