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A170840 G.f.: Prod_{k >= 2} (1 + x^(2^k-1) + 3x^(2^k)). 0
1, 0, 0, 1, 3, 0, 0, 1, 3, 0, 1, 6, 9, 0, 0, 1, 3, 0, 1, 6, 9, 0, 1, 6, 9, 1, 9, 27, 27, 0, 0, 1, 3, 0, 1, 6, 9, 0, 1, 6, 9, 1, 9, 27, 27, 0, 1, 6, 9, 1, 9, 27, 27, 1, 9, 27, 28, 12, 54, 108, 81, 0, 0, 1, 3, 0, 1, 6, 9, 0, 1, 6, 9, 1, 9, 27, 27, 0, 1, 6, 9, 1, 9, 27, 27, 1, 9, 27, 28, 12, 54, 108, 81, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

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: A165974 A090622 A035696 * A035630 A126723 A235794

Adjacent sequences:  A170837 A170838 A170839 * A170841 A170842 A170843

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified February 20 16:25 EST 2018. Contains 299380 sequences. (Running on oeis4.)