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A038068 prod{k=1..inf}((1+x^k)^a(k)) = 1+3x. 0
3, -3, 8, -21, 48, -116, 312, -831, 2184, -5880, 16104, -44336, 122640, -341484, 956576, -2690841, 7596480, -21522228, 61171656, -174342144, 498111952, -1426403748, 4093181688, -11767919276, 33891544368, -97764009000 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

N. J. A. Sloane, Weigh transform

FORMULA

Dirichlet convolution of A038064 with characteristic function of powers of 2.

CROSSREFS

Cf. A038063-A038070.

Sequence in context: A027376 A190659 A202536 * A101126 A119006 A109695

Adjacent sequences:  A038065 A038066 A038067 * A038069 A038070 A038071

KEYWORD

sign

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jan 04 1999.

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.