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%I #7 Feb 24 2021 02:48:18
%S 2,2,4,8,8,4,8,12,8,8,16,24,20,12,20,20,8,8,16,24,20,16,28,32,24,32,
%T 56,68,52,40,52,36,8,8,16,24,20,16,28,32,24,32,56,68,52,44,60,48,24,
%U 32,56,68,56,60,88,88,80,120,180,188,144,128,132,68,8,8,16,24,20,16,28,32,24
%N First differences of A160158.
%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, A160158, A160162, A160163.
%K nonn
%O 1,1
%A _Omar E. Pol_, May 29 2009
%E Extended beyond a(13) by _R. J. Mathar_, Jun 01 2009
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