

A151726


First differences of A151725.


5



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
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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), 157191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n1)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 ApplegatePolSloane 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, A151727A151729.
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



