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A170857 a(0) = 0, a(1) = 1; a(2^i + j) = 3a(j) + 3a(j + 1) for 0 <= j < 2^i. 0
0, 1, 3, 12, 3, 12, 45, 45, 3, 12, 45, 45, 45, 171, 270, 144, 3, 12, 45, 45, 45, 171, 270, 144, 45, 171, 270, 270, 648, 1323, 1242, 441, 3, 12, 45, 45, 45, 171, 270, 144, 45, 171, 270, 270, 648, 1323, 1242, 441, 45, 171, 270, 270, 648, 1323, 1242, 567, 648, 1323, 1620, 2754 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..59.

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: A110121 A288518 A069522 * A227106 A085296 A214401

Adjacent sequences:  A170854 A170855 A170856 * A170858 A170859 A170860

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified February 21 19:26 EST 2018. Contains 299422 sequences. (Running on oeis4.)