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 A160162 #7 Feb 24 2021 02:48:18 %S A160162 0,1,2,4,8,12,14,18,24,28,32,40,52,62,68,78,88,92,96,104,116,126,134, %T A160162 148,164,176,192,220,254,280,300,326,344,348,352,360,372,382,390,404, %U A160162 420,432,448,476,510,536,558,588,612,624,640,668,702,730,760,804,848 %N A160162 a(n) = A160158(n)/2. %H A160162 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 A160162 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 A160162 Cf. A139250, A160158, A160406, A160730, A160732, A160736, A160738, A160740. %K A160162 nonn %O A160162 0,3 %A A160162 _Omar E. Pol_, May 29 2009 %E A160162 Extended beyond a(13) by _R. J. Mathar_, Jun 01 2009