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 A162627 #10 Feb 24 2021 02:48:18 %S A162627 2,3,3,4,6,7,5,4,6,8,10,14,18,17,9,4,6,8,10,14,18,18,14,14,20,26,34, %T A162627 46,52,41,17,4,6,8,10,14,18,18,14,14,20,26,34,46,52,42,22,14,20,26,34, %U A162627 46,54,50,42,48,66,86,114,144,144,97,33,4,6,8,10,14,18,18 %N A162627 a(n) = A162625(n+1)/2. %H A162627 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 A162627 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 A162627 Cf. A139250, A139251, A147614, A152968, A160421, A160423, A162625. %K A162627 nonn %O A162627 1,1 %A A162627 _Omar E. Pol_, Aug 05 2009 %E A162627 More terms from _Jinyuan Wang_, Mar 03 2020