%I #12 Feb 24 2021 02:48:18
%S 1,3,5,7,13,11,17,15,21,23,25,27,33,27,25,15,25,35,41,55,53,59,61,59,
%T 65,63,57,47,37,47,65,71,97,95,105,95,89,83,81,87,93,79,73,79,89,107,
%U 113,119,113,115,117,135,125,127,129,135,153,135
%N First differences of A161328.
%C Number of E-Toothpicks added to the E-Toothpick structure at the n-th round.
%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. A139251, A160121, A160173, A161328, A161331.
%K nonn
%O 1,2
%A _Omar E. Pol_, Jun 07 2009
%E a(8) corrected and more terms added by _R. J. Mathar_, Jan 21 2010