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%I #16 Feb 24 2021 02:48:18
%S 3,4,6,6,8,12,14,10,8,12,16,20,28,36,34,18,8,12,16,20,28,36,36,28,28,
%T 40,52,68,92,104,82,34,8,12,16,20,28,36,36,28,28,40,52,68,92,104,84,
%U 44,28,40,52,68,92,108,100,84,96,132,172,228,288,288,194,66,8
%N Number of cells turned "ON" at n-th stage of cellular automaton whose virtual skeleton is a polyedge as the toothpick structure of A139250.
%C First differences of A147614.
%C The main entry for this sequence is A139250, the toothpick sequence. See also A139251.
%H Jinyuan Wang, <a href="/A162625/b162625.txt">Table of n, a(n) for n = 1..1000</a>
%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, A147614, A160420, A160421, A160422, A160423, A162627.
%K nonn
%O 1,1
%A _Omar E. Pol_, Aug 05 2009
%E More terms from _Nathaniel Johnston_, Nov 15 2010
%E More terms from _Jinyuan Wang_, Mar 03 2020
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