%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 David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="http://neilsloane.com/doc/tooth.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>
%Y Cf. A139250, A139251, A147614, A160420, A160421, A160422, A160423, A162627.
%A _Omar E. Pol_, Aug 05 2009
%E More terms from _Nathaniel Johnston_, Nov 15 2010