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

0,3

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

Table of n, a(n) for n=0..38.

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.

Sequence in context: A019197 A066106 A030296 * A195752 A095806 A096872

Adjacent sequences: A160168 A160169 A160170 * A160172 A160173 A160174

Keyword

nonn

Author

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

Extensions

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

Status

approved