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%I #10 Feb 24 2021 02:48:18
%S 5,4,8,13,12,10,17,21,12,10,17,21,20,26,41,37,12,10,17,21,20,26,41,37,
%T 20,26,41,45,52,82,105,69,12,10,17,21,20,26,41,37,20,26,41,45,52,82,
%U 105,69,20,26,41,45,52,82,105
%N First differences of A160426.
%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.
%K nonn
%O 1,1
%A _Omar E. Pol_, May 25 2009
%E Terms after a(13) from _Nathaniel Johnston_, Mar 31 2011
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