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 A159791 #16 Feb 24 2021 02:48:18 %S A159791 0,3,11,23,43,55,79,123,171,183,207,251,303,347,423,571,683,695,719, %T A159791 763,815,859,935,1083,1199,1243,1319,1467,1607,1759,2011,2475,2731, %U A159791 2743,2767,2811,2863,2907,2983,3131,3247,3291,3367,3515,3655,3807,4059,4523,4783,4827,4903,5051,5191,5343,5595,6059,6343,6495,6747,7215 %N A159791 Bisection of toothpick sequence A139250. %H A159791 Robert Price, <a href="/A159791/b159791.txt">Table of n, a(n) for n = 1..32768</a> %H A159791 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 A159791 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 A159791 Cf. A139250. %K A159791 nonn %O A159791 1,2 %A A159791 _Omar E. Pol_, Apr 28 2009 %E A159791 a(28)-a(60) from _Robert Price_, May 10 2019