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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 (list; graph; refs; listen; history; text; internal format)
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 A173855 A143368

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

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Last modified January 19 03:56 EST 2019. Contains 319297 sequences. (Running on oeis4.)