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 A162798 #7 Feb 24 2021 02:48:18 %S A162798 1,2,4,4,4,4,8,16,28,16,8,4,8,16,28,28,32,40,76,116,176,72,24,16,12, %T A162798 20,28,28,32,40,76,116,176,108,84,88,136,180,248,224,268,332,584,744, %U A162798 1000,384,152,168,132,96,56,60,64,56,84,120,176,108,84,88,136,180,248,224 %N A162798 a(n) = A160161(n+1)/2. %H A162798 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 A162798 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 A162798 Cf. A139250, A139251, A160160, A160161, A162799. %K A162798 nonn %O A162798 1,2 %A A162798 _Omar E. Pol_, Jul 28 2009