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A028343 Expansion of prod( (1-x^i)^(1/i), i = 1..infinity); also of exp(- sum( d(n)*x^n /n, n = 1..infinity)) where d is number of divisors function. 1
1, -1, -1, 1, -1, 41, -131, 1499, -4159, 10639, 100871, 4142249, -111459041, 1127459321, 1797229589, -185028952109, 706529394689, 29136228245279, -547852336663409, 7139784702100049, -195178627579232449 (list; graph; refs; listen; history; internal format)
OFFSET

0,6

CROSSREFS

Sequence in context: A142290 A013643 A142333 * A165816 A142449 A044373

Adjacent sequences:  A028340 A028341 A028342 * A028344 A028345 A028346

KEYWORD

sign

AUTHOR

Jeffrey Shallit (shallit(AT)graceland.uwaterloo.ca)

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Last modified February 17 12:38 EST 2012. Contains 206021 sequences.