A151726 First differences of A151725.

0, 1, 8, 4, 20, 4, 20, 20, 44, 4, 20, 20, 44, 28, 60, 76, 92, 4, 20, 20, 44, 28, 60, 76, 92, 28, 60, 84, 116, 116, 196, 236, 188, 4, 20, 20, 44, 28, 60, 76, 92, 28, 60, 84, 116, 116, 196, 236, 188, 28, 60, 84, 116, 116, 196, 244, 212, 116, 204, 284, 348, 428

Offset

0,3

Links

David Applegate, Table of n, a(n) for n = 0..1000

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

David Applegate, The movie version

Formula

For a recurrence see the Applegate-Pol-Sloane paper.

Example

May be written as a triangle:
0,
1,
8,
4,20,
4,20,20,44,
4,20,20,44,28,60,76,92,
4,20,20,44,28,60,76,92,28,60,84,116,116,196,236,188,
4,20,20,44,28,60,76,92,28,60,84,116,116,196,236,188,28,60,84,116,116,196,244,212,116,204,...
The rows converge to A151727.

Crossrefs

Cf. A151725, A151727-A151729.

Cf. A139251. [From Omar E. Pol, Dec 14 2009]

Sequence in context: A018810 A070485 A248293 * A070290 A307266 A173855

Adjacent sequences: A151723 A151724 A151725 * A151727 A151728 A151729

Keyword

nonn,tabf,look

Author

David Applegate and N. J. A. Sloane, Jun 13 2009

Status

approved