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%I #7 Feb 24 2021 02:48:18
%S 0,3,6,12,18,24,30,42,54,60,66,78,90,102,120,150,174,180,186,198,210,
%T 222,240,270,294,306,324,354,384,420,480,558,606,612,618,630,642,654,
%U 672,702,726,738,756,786,816,852,912,990,1038,1050,1068,1098,1128,1164
%N Toothpick sequence starting from a T formed by 3 toothpicks: a(n)=A160406(n)*3.
%H 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 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 Cf. A139250, A139251, A160736, A160737, A160739, A160740.
%K nonn
%O 0,2
%A _Omar E. Pol_, May 25 2009, Jun 19 2009
%E More terms from _R. J. Mathar_, Jul 28 2009
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