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a(n) = A161330(n)*3.
3

%I #10 Feb 24 2021 02:48:18

%S 0,6,24,42,60,114,132,186,240,294,384,438,528,654,672,726,780,870,

%T 1032,1122,1356,1482,1644,1878,2004,2202,2436,2490,2616,2742,2904,

%U 3174,3372,3750,4020,4290,4596,4794,5028,5298,5568,5838,6000,6198,6540,6774,7152,7530

%N a(n) = A161330(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, A161330, A161334, A161335.

%K nonn

%O 0,2

%A _Omar E. Pol_, Jun 09 2009

%E More terms from _Jinyuan Wang_, Mar 14 2020