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A170860 a(0) = 1, a(1) = 0; a(2^i + j) = a(j) + 3a(j + 1) for 0 <= j < 2^i. 0
1, 0, 1, 3, 1, 3, 10, 6, 1, 3, 10, 6, 10, 33, 28, 9, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 10, 33, 28, 36, 109, 117, 55, 39, 109, 117, 136, 363, 460, 282, 91, 15, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..75.

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: A128162 A257253 A067329 * A170845 A025238 A289066

Adjacent sequences:  A170857 A170858 A170859 * A170861 A170862 A170863

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified October 17 00:03 EDT 2018. Contains 316275 sequences. (Running on oeis4.)