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A151554 G.f.: (1 + 2x) * Prod_{ n >= 1} (1 + x^(2^n-1) + x^(2^n)). 3
1, 3, 3, 3, 4, 6, 5, 3, 4, 6, 6, 7, 10, 11, 7, 3, 4, 6, 6, 7, 10, 11, 8, 7, 10, 12, 13, 17, 21, 18, 9, 3, 4, 6, 6, 7, 10, 11, 8, 7, 10, 12, 13, 17, 21, 18, 10, 7, 10, 12, 13, 17, 21, 19, 15, 17, 22, 25, 30, 38, 39, 27, 11, 3, 4, 6, 6, 7, 10, 11, 8, 7, 10, 12, 13, 17, 21, 18, 10, 7, 10, 12, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 0..16383

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

Cf. A139250, A151550, A151551, A151552, A151553.

Sequence in context: A090903 A022878 A022877 * A221028 A011978 A167025

Adjacent sequences:  A151551 A151552 A151553 * A151555 A151556 A151557

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 20 2009

STATUS

approved

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Last modified December 12 11:56 EST 2018. Contains 318060 sequences. (Running on oeis4.)