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%I #9 Feb 24 2021 02:48:18
%S 1,2,4,6,8,10,12,14,12,12,18,24,30,30,28,30,20,12,18,26,34,42,50,56,
%T 54,44,48,64,82,80,68,66,36,12,18,26,34,42,50,58,58,54,66,90,114,126,
%U 122,120,102,60,48,70,94,118,142,160,162,136,130,160,204,198,160,142,68,12
%N First differences of A161206.
%C Number of V-toothpicks added to the V-toothpick structure at the n-th round.
%H David Applegate, <a href="/A139250/a139250.anim.html">The movie version</a>
%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, A139251, A160121, A160173, A161206, A161329, A161331.
%K nonn
%O 1,2
%A _Omar E. Pol_, Jun 08 2009
%E More terms from _R. J. Mathar_, Jan 21 2010
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