A173069 a(n) = A139251(n) - A105321(n).

-1, -2, -2, -2, -2, -2, 0, 0, -2, -2, 0, 0, 0, 4, 12, 8, -2, -2, 0, 0, 0, 4, 12, 8, 0, 4, 12, 12, 16, 36, 56, 32, -2, -2, 0, 0, 0, 4, 12, 8, 0, 4, 12, 12, 16, 36, 56, 32, 0, 4, 12, 12, 16, 36, 56, 36, 16, 36, 60, 64, 92, 160, 192, 96, -2, -2, 0, 0, 0, 4, 12, 8, 0, 4, 12

Offset: 0

Author

Omar E. Pol, May 29 2010

Keywords

• sign

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

Crossrefs

Cf. A105321, A139250, A139251, A173522.

Extensions

More terms from Nathaniel Johnston, Nov 15 2010