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

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

Offset: 0

Author

Omar E. Pol, Jun 18 2009

Keywords

• more
• nonn

Links

• 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

Crossrefs

Cf. A139250, A160120.

Formula

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