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%I #10 Feb 24 2021 02:48:18
%S 0,0,1,2,2,3,8,12,12,13,16,18,19,26,44,56,56,57,60,62,63,70,84,92,93,
%T 98,106,111,120,152,216,240,240,241,244,246,247,254,268,276,277,282,
%U 290,295,304,336,384,408,409,414
%N a(n) = A159786(n+1)/4.
%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 Toothpick sequence: A139250.
%Y Cf. A139251, A153000, A159786, A159787, A159788, A159799.
%K nonn
%O 0,4
%A _Omar E. Pol_, Apr 28 2009, May 02 2009
%E More terms from _Colin Barker_, Apr 19 2015
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