A160171 First differences of X-toothpicks numbers A160170.

0, 1, 4, 8, 8, 24, 32, 32, 56, 80, 80, 88, 112, 160, 168, 240, 224, 344, 320, 320, 344, 448, 528, 536, 704, 704, 872, 736, 880, 840, 1024, 1088, 1256, 1328, 1392, 1416, 1440, 1504, 1656

Offset: 0

Author

Omar E. Pol, May 03 2009, Dec 13 2010

Keywords

• nonn

Comments

Number of X-toothpicks added at n-th stage to the three-dimensional X-toothpick structure of A160170.

For another version see A170875.

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
• Index entries for sequences related to toothpick sequences

Crossrefs

X-toothpick sequence: A160170.

Cf. A139250, A139251, A160120, A160121, A160160, A160161, A170875.

Extensions

More terms (a(6)-a(38)) based on Email from R. J. Mathar dated on Jan 10 2010.