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 A152973 #15 Feb 24 2021 02:48:18 %S A152973 1,2,4,6,8,14,16,18,20,30,44,46,56,70,104,128,130,148,182,244,336,352, %T A152973 354,372,478,608,824,1024,1026,1048,1054,1198,1564,2040,2672,2976, %U A152973 2978,3000,3150,3960,5168,6752,8320,8322,8344,8348,8494,8550,9306 %N A152973 Records in A152968. %C A152973 Excluding the initial 1, this sequence also gives the records in A151688. - _Nathaniel Johnston_, Apr 10 2011 %H A152973 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 A152973 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 A152973 Toothpick structure: A139250. %Y A152973 Cf. A139251, A139252, A152968. %Y A152973 Cf. A152978. %K A152973 nonn %O A152973 1,2 %A A152973 _Omar E. Pol_, Dec 16 2008 %E A152973 More terms from _Omar E. Pol_, Dec 20 2008 %E A152973 a(17)-a(49) from _Nathaniel Johnston_, Apr 10 2011