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 A152768 #11 Feb 24 2021 02:48:18 %S A152768 1,2,4,8,12,16,28,32,36,40,60,88,92,112,140,208,256,260,296,364,488, %T A152768 672,704,708,744,956,1216,1648,2048,2052,2096,2108,2396,3128,4080, %U A152768 5344,5952,5956,6000,6300,7920,10336,13504,16640,16644,16688,16696,16988,17100,18612,20040 %N A152768 Records in A139251. %C A152768 Excluding the initial 1 and 2, this sequence also gives the records in A147646. - Nathaniel Johnston, Apr 10 2011 %H A152768 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 A152768 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 A152768 Cf. A139251, A139252, A139560. Toothpick sequence: A139250. %Y A152768 Cf. A052184. %K A152768 nonn %O A152768 1,2 %A A152768 _Omar E. Pol_, Dec 15 2008, Dec 20 2008 %E A152768 a(18) - a(51) from _Nathaniel Johnston_, Apr 10 2011