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A170845 G.f.: Prod_{k >= 1} (1 + 3x^(2^k-1) + x^(2^k)). 0
1, 3, 1, 3, 10, 6, 1, 3, 10, 6, 10, 33, 28, 9, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109, 117, 55, 12, 10, 33, 28, 36, 109, 117, 55, 39, 109, 117, 136, 363, 460, 282, 91, 15, 1, 3, 10, 6, 10, 33, 28, 9, 10, 33, 28, 36, 109 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..74.

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: A257253 A067329 A170860 * A025238 A289066 A126970

Adjacent sequences:  A170842 A170843 A170844 * A170846 A170847 A170848

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified January 21 13:07 EST 2019. Contains 319350 sequences. (Running on oeis4.)