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A038070 prod{k=1..inf}((1+x^k)^a(k)) = 1+5x. 7
5, -10, 40, -160, 624, -2580, 11160, -48910, 217000, -976248, 4438920, -20346280, 93900240, -435959820, 2034504992, -9536767660, 44878791360, -211927516500, 1003867701480, -4768372069968, 22706531339280 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

N. J. A. Sloane, Weigh transform

FORMULA

Dirichlet convolution of A038066 with characteristic function of powers of 2.

CROSSREFS

Cf. A038063-A038069.

Sequence in context: A117865 A163305 A001692 * A136138 A186031 A187877

Adjacent sequences:  A038067 A038068 A038069 * A038071 A038072 A038073

KEYWORD

sign

AUTHOR

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

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Last modified February 16 19:20 EST 2012. Contains 205945 sequences.