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A292875
Expansion of the series reversion of Sum_{k>=1} x^k*k*Product_{p|k, p prime} (1 + 1/p).
1
1, -3, 14, -81, 528, -3708, 27388, -209739, 1650204, -13258230, 108311352, -896946048, 7512187398, -63520243398, 541511083648, -4649182740159, 40163784583752, -348870785898510, 3045109181792304, -26694854975488554, 234936349043049246, -2074958037081265050
OFFSET
1,2
COMMENTS
Reversion of g.f. for A001615 (Dedekind psi function).
LINKS
N. J. A. Sloane, Transforms
Eric Weisstein's World of Mathematics, Series Reversion
Eric Weisstein's World of Mathematics, Dedekind Function
FORMULA
G.f. A(x) satisfies: Sum_{k>=1} A(x)^k*k*Product_{p|k, p prime} (1 + 1/p) = x.
CROSSREFS
Sequence in context: A256336 A256338 A256331 * A077054 A355291 A325219
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Sep 25 2017
STATUS
approved