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A170848 G.f.: Prod_{k >= 1} (1 + 3x^(2^k-1) + 2x^(2^k)). 0
1, 3, 2, 3, 11, 12, 4, 3, 11, 12, 13, 39, 58, 36, 8, 3, 11, 12, 13, 39, 58, 36, 17, 39, 58, 63, 143, 252, 224, 96, 16, 3, 11, 12, 13, 39, 58, 36, 17, 39, 58, 63, 143, 252, 224, 96, 25, 39, 58, 63, 143, 252, 224, 123, 151, 252, 305, 555, 1042, 1176, 736, 240, 32, 3, 11, 12, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..66.

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: A292024 A290093 A186102 * A078017 A169816 A291739

Adjacent sequences:  A170845 A170846 A170847 * A170849 A170850 A170851

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified October 14 23:58 EDT 2019. Contains 328025 sequences. (Running on oeis4.)