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A170865 a(0) = 1, a(1) = 1; a(2^i + j) = a(j) + 3a(j + 1) for 0 <= j < 2^i. 0
1, 1, 4, 13, 4, 13, 43, 25, 4, 13, 43, 25, 43, 142, 118, 37, 4, 13, 43, 25, 43, 142, 118, 37, 43, 142, 118, 154, 469, 496, 229, 49, 4, 13, 43, 25, 43, 142, 118, 37, 43, 142, 118, 154, 469, 496, 229, 49, 43, 142, 118, 154, 469, 496, 229, 166, 469, 496, 580, 1561, 1957, 1183 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..61.

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: A212256 A265327 A130650 * A191509 A218356 A249120

Adjacent sequences:  A170862 A170863 A170864 * A170866 A170867 A170868

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified February 20 22:25 EST 2018. Contains 299387 sequences. (Running on oeis4.)