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A170868 a(0) = 1, a(1) = 2; a(2^i + j) = 3a(j) + a(j + 1) for 0 <= j < 2^i. 0
1, 2, 5, 11, 5, 11, 26, 38, 5, 11, 26, 38, 26, 59, 116, 119, 5, 11, 26, 38, 26, 59, 116, 119, 26, 59, 116, 140, 137, 293, 467, 362, 5, 11, 26, 38, 26, 59, 116, 119, 26, 59, 116, 140, 137, 293, 467, 362, 26, 59, 116, 140, 137, 293, 467, 383, 137, 293, 488, 557, 704, 1346, 1763 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..62.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

CROSSREFS

Sequence in context: A246208 A286091 A127011 * A276736 A069162 A300677

Adjacent sequences:  A170865 A170866 A170867 * A170869 A170870 A170871

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified December 8 18:37 EST 2019. Contains 329865 sequences. (Running on oeis4.)