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A170848 G.f.: Prod_{k >= 1} (1 + 3x^(2^k-1) + 2x^(2^k)). 0

%I

%S 1,3,2,3,11,12,4,3,11,12,13,39,58,36,8,3,11,12,13,39,58,36,17,39,58,

%T 63,143,252,224,96,16,3,11,12,13,39,58,36,17,39,58,63,143,252,224,96,

%U 25,39,58,63,143,252,224,123,151,252,305,555,1042,1176,736,240,32,3,11,12,13

%N G.f.: Prod_{k >= 1} (1 + 3x^(2^k-1) + 2x^(2^k)).

%H David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="http://neilsloane.com/doc/tooth.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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Last modified February 22 10:29 EST 2019. Contains 320395 sequences. (Running on oeis4.)