A160789 Y-toothpick number A160120(n) minus toothpick number A139250(n).

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

Offset

0,5

Links

Table of n, a(n) for n=0..10.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, 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.]

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Omar E. Pol, OEIS, Plot 2, A160120 and A139250 vs n

Formula

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

Crossrefs

Cf. A139250, A160120.

Sequence in context: A123587 A018840 A058209 * A266111 A131291 A305394

Adjacent sequences: A160786 A160787 A160788 * A160790 A160791 A160792

Keyword

more,nonn

Author

Omar E. Pol, Jun 18 2009

Status

approved