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A151692 G.f.: Prod_{ k >= 2 } (1 + x^(2^k-1) + x^(2^k)). 10
1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 2, 1, 0, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 1, 1, 3, 3, 1, 0, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 1, 1, 3, 3, 1, 0, 1, 2, 1, 1, 3, 3, 1, 1, 3, 3, 2, 4, 6, 4, 1, 0, 0, 1, 1, 0, 1, 2, 1, 0, 1, 2, 1, 1, 3, 3, 1, 0, 1, 2, 1, 1, 3, 3, 1, 1, 3, 3, 2, 4, 6, 4, 1, 0, 1, 2, 1, 1, 3, 3, 1, 1, 3, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,12

LINKS

Table of n, a(n) for n=0..104.

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

EXAMPLE

Contribution from Omar E. Pol, Jun 09 2009: (Start)

Triangle begins:

1;

0,0;

1,1,0,0;

1,1,0,1,2,1,0,0;

1,1,0,1,2,1,0,1,2,1,1,3,3,1,0,0;

1,1,0,1,2,1,0,1,2,1,1,3,3,1,0,1,2,1,1,3,3,1,1,3,3,2,4,6,4,1,0,0;

1,1,0,1,2,1,0,1,2,1,1,3,3,1,0,1,2,1,1,3,3,1,1,3,3,2,4,6,4,1,0,1,2,1,1,3,3,...

(End)

CROSSREFS

For generating functions of the form Prod_{k>=c} (1+a*x^(2^k-1)+b*x^2^k)) for the following values of (a,b,c) see: (1,1,0) A160573, (1,1,1) A151552, (1,1,2) A151692, (2,1,0) A151685, (2,1,1) A151691, (1,2,0) A151688 and A152980, (1,2,1) A151550, (2,2,0) A151693, (2,2,1) A151694

Cf. A160573, A151552.

Cf. A000079. [From Omar E. Pol, Jun 09 2009]

Sequence in context: A049340 A056929 A304096 * A280829 A303942 A115201

Adjacent sequences:  A151689 A151690 A151691 * A151693 A151694 A151695

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 04 2009

STATUS

approved

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Last modified October 23 14:06 EDT 2018. Contains 316528 sequences. (Running on oeis4.)