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 A160744 #7 Feb 24 2021 02:48:18 %S A160744 0,3,6,12,18,24,30,42,54,60,66,78,90,102,114,138,162,168,174,186,198, %T A160744 210,222,246,270,282,294,318,342,366,390,438,486,492,498,510,522,534, %U A160744 546,570,594,606,618,642,666,690,714,762,810,822,834,858,882,906,930 %N A160744 a(n) = A151566(n)*3. %H A160744 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 A160744 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 A160744 Cf. A139250, A151566, A160720, A160722, A160736, A160738, A160740, A160742, A160746. %K A160744 nonn %O A160744 0,2 %A A160744 _Omar E. Pol_, May 25 2009 %E A160744 More terms from _R. J. Mathar_, Jul 28 2009