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Y-toothpick number A160120(n) minus toothpick number A139250(n).
0

%I #8 Feb 24 2021 02:48:18

%S 0,0,1,0,5,4,5,2,15,20,21

%N Y-toothpick number A160120(n) minus toothpick number A139250(n).

%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 Omar E. Pol, <a href="/plot2a?name1=A160120&amp;name2=A139250&amp;tform1=untransformed&amp;tform2=untransformed&amp;shift=0&amp;radiop1=matp&amp;drawpoints=true&amp;drawlines=true">OEIS, Plot 2, A160120 and A139250 vs n</a>

%F a(n) = A160120(n)-A139250(n).

%Y Cf. A139250, A160120.

%K more,nonn

%O 0,5

%A _Omar E. Pol_, Jun 18 2009