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%I #9 Feb 24 2021 02:48:19
%S 1,3,1,3,10,6,1,3,10,6,10,33,28,9,1,3,10,6,10,33,28,9,10,33,28,36,109,
%T 117,55,12,1,3,10,6,10,33,28,9,10,33,28,36,109,117,55,12,10,33,28,36,
%U 109,117,55,39,109,117,136,363,460,282,91,15,1,3,10,6,10,33,28,9,10,33,28,36,109
%N G.f.: Product_{k>=1} (1 + 3x^(2^k-1) + x^(2^k)).
%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>
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Jan 02 2010
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