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A170846 G.f.: Prod_{k >= 2} (1 + 3x^(2^k-1) + x^(2^k)). 0
1, 0, 0, 3, 1, 0, 0, 3, 1, 0, 9, 6, 1, 0, 0, 3, 1, 0, 9, 6, 1, 0, 9, 6, 1, 27, 27, 9, 1, 0, 0, 3, 1, 0, 9, 6, 1, 0, 9, 6, 1, 27, 27, 9, 1, 0, 9, 6, 1, 27, 27, 9, 1, 27, 27, 9, 82, 108, 54, 12, 1, 0, 0, 3, 1, 0, 9, 6, 1, 0, 9, 6, 1, 27, 27, 9, 1, 0, 9, 6, 1, 27, 27, 9, 1, 27, 27, 9, 82, 108, 54, 12, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..93.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

CROSSREFS

Sequence in context: A107131 A027200 A035654 * A085604 A144357 A122848

Adjacent sequences:  A170843 A170844 A170845 * A170847 A170848 A170849

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified February 20 01:26 EST 2018. Contains 299357 sequences. (Running on oeis4.)