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%I #12 Feb 24 2021 02:48:18
%S 0,1,8,4,20,4,20,20,44,4,20,20,44,28,60,76,92,4,20,20,44,28,60,76,92,
%T 28,60,84,116,116,196,236,188,4,20,20,44,28,60,76,92,28,60,84,116,116,
%U 196,236,188,28,60,84,116,116,196,244,212,116,204,284,348,428
%N First differences of A151725.
%H David Applegate, <a href="/A151726/b151726.txt">Table of n, a(n) for n = 0..1000</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>
%H David Applegate, <a href="/A139250/a139250.anim.html">The movie version</a>
%F For a recurrence see the Applegate-Pol-Sloane paper.
%e May be written as a triangle:
%e 0,
%e 1,
%e 8,
%e 4,20,
%e 4,20,20,44,
%e 4,20,20,44,28,60,76,92,
%e 4,20,20,44,28,60,76,92,28,60,84,116,116,196,236,188,
%e 4,20,20,44,28,60,76,92,28,60,84,116,116,196,236,188,28,60,84,116,116,196,244,212,116,204,...
%e The rows converge to A151727.
%Y Cf. A151725, A151727-A151729.
%Y Cf. A139251. [From _Omar E. Pol_, Dec 14 2009]
%K nonn,tabf,look
%O 0,3
%A _David Applegate_ and _N. J. A. Sloane_, Jun 13 2009
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