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 A160719 #10 Feb 24 2021 02:48:18 %S A160719 0,1,2,3,4,6,8,9,10,12,14,16,19,24,28,29,30,32,34,36,39,44,48,50,53, %T A160719 58,63,69,79,92,100,101,102,104,106,108,111,116,120,122,125,130,135, %U A160719 141,151,164,172,174,177,182,187,193,203,216,225,231,241,255,270,291 %N A160719 a(n) = A160406(n+2)/2 - 1. %H A160719 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 A160719 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 A160719 Cf. A139250, A153000, A160406, A160407, A160718. %K A160719 nonn %O A160719 0,3 %A A160719 _Omar E. Pol_, Jun 10 2009 %E A160719 More terms from _Jinyuan Wang_, Mar 04 2020