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%I #9 Feb 24 2021 02:48:18
%S 2,2,6,2,6,6,14,6,6,6,14,10,14,18,34,18,6,6,14,10,14,18,34,22,14,18,
%T 34,34,38,46,78,54,14,6,14,10,14,18,34,22,14,18,34,34,38,46,78,58,22,
%U 18,34,34,38,50,86,78,50,46,78,90,94,114,186,154,46,6,14
%N a(n) = A160121(n+1)*2/3.
%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 Y-toothpick sequence: A160120. Cf. A160121, A160123.
%Y Cf. A139250, A139251. [From _Omar E. Pol_, Jun 16 2009]
%K nonn
%O 1,1
%A _Omar E. Pol_, May 02 2009
%E More terms from _Omar E. Pol_, Jun 16 2009
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