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A159785 a(n) = A152980(n)*3. 1
3, 6, 9, 9, 12, 21, 24, 15, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

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

CROSSREFS

Toothpick sequence: A139250.

Cf. A139251, A147646, A152968, A152978, A152980, A153004, A153006.

Sequence in context: A011383 A007844 A224523 * A057338 A077856 A239977

Adjacent sequences:  A159782 A159783 A159784 * A159786 A159787 A159788

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, May 02 2009

STATUS

approved

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Last modified January 20 02:51 EST 2019. Contains 319323 sequences. (Running on oeis4.)