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A170854 a(0) = 0, a(1) = 1; a(2^i + j) = 3a(j) + 2a(j + 1) for 0 <= j < 2^i. 2
0, 1, 2, 7, 2, 7, 20, 25, 2, 7, 20, 25, 20, 61, 110, 79, 2, 7, 20, 25, 20, 61, 110, 79, 20, 61, 110, 115, 182, 403, 488, 241, 2, 7, 20, 25, 20, 61, 110, 79, 20, 61, 110, 115, 182, 403, 488, 241, 20, 61, 110, 115, 182, 403, 488, 277, 182, 403, 560, 709, 1352, 2185, 1946, 727, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..64.

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: A181284 A010697 A088666 * A215140 A278419 A197133

Adjacent sequences:  A170851 A170852 A170853 * A170855 A170856 A170857

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified October 20 11:13 EDT 2018. Contains 316379 sequences. (Running on oeis4.)