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 A163094 #12 Feb 24 2021 02:48:18 %S A163094 0,1,3,7,11,15,21,35,43,47,53,67,77,91,111,155,171,175,181,195,205, %T A163094 219,239,283,301,315,335,379,407,453,523,651,683,687,693,707,717,731, %U A163094 751,795,813,827,847,891,919,965,1035,1163,1197,1211,1231,1275,1303,1349,1419 %N A163094 a(n) = A162796(n)/2. %H A163094 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 A163094 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 A163094 Cf. A139250, A139251, A159791, A159792, A162793, A162794, A162795, A162796, A162797. %K A163094 nonn %O A163094 0,3 %A A163094 _Omar E. Pol_, Jul 28 2009 %E A163094 a(0) prepended by and more terms from _Jinyuan Wang_, Mar 15 2020