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A170839 G.f.: Prod_{k >= 1} (1 + x^(2^k-1) + 3x^(2^k)). 0
1, 1, 3, 1, 4, 6, 9, 1, 4, 6, 10, 7, 18, 27, 27, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81, 108, 81, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81, 108, 82, 7, 18, 28, 37, 39, 81, 109, 91, 39, 82, 121, 150, 198, 351, 405, 243, 1, 4, 6, 10, 7, 18, 27, 28, 7, 18, 28, 37, 39, 81 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..76.

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: A072267 A024934 A186358 * A049918 A028861 A081521

Adjacent sequences:  A170836 A170837 A170838 * A170840 A170841 A170842

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified October 21 18:00 EDT 2018. Contains 316427 sequences. (Running on oeis4.)