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A046106 G.f.: g.f. for A001411 / g.f. for A004018. 0
1, 0, 8, 4, 48, 68, 284, 684, 1816, 5608, 12684, 42068, 92916, 304100, 688988, 2170020, 5088784, 15436172, 37281880, 109786204, 271062388, 781016892, 1958863988, 5555714820, 14090644980, 39503105472, 101000072900, 280693435596 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..27.

EXAMPLE

1 + 4*q + 12*q^2 + 36*q^3 + 100*q^4 + 284*q^5 + 780*q^6 + 2172*q^7 + 5916*q^8 + 16268*q^9 + ... / 1 + 4*q + 4*q^2 + 4*q^4 + 8*q^5 + 4*q^8 + 4*q^9 + ... = 1 + 8*q^2 + 4*q^3 + 48*q^4 + 68*q^5 + 284*q^6 + 684*q^7 + 1816*q^8 + 5608*q^9 + ...

CROSSREFS

Cf. A001411, A004018.

Sequence in context: A270934 A271004 A271051 * A112584 A112546 A112583

Adjacent sequences:  A046103 A046104 A046105 * A046107 A046108 A046109

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, based on a suggestion of Maurice Craig (Maurice.D.Craig(AT)BHPBilliton.com), May 11 2003

STATUS

approved

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Last modified May 20 16:58 EDT 2022. Contains 353876 sequences. (Running on oeis4.)