A291533 Expansion of the series reversion of g.f. for the nonprime numbers (A018252).

1, -4, 26, -208, 1859, -17790, 178308, -1847882, 19640154, -212911066, 2345049018, -26168243862, 295214515662, -3361428239216, 38580429168968, -445874925644701, 5184317812361117, -60603410700370525, 711826341810784570, -8396670336877539127, 99428914632341468974

Offset

1,2

Links

Table of n, a(n) for n=1..21.

N. J. A. Sloane, Transforms

Eric Weisstein's World of Mathematics, Series Reversion

Index entries for reversions of series

Formula

G.f. A(x) satisfies: A(x) + 4*A(x)^2 + 6*A(x)^3 + 8*A(x)^4 + 9*A(x)^5 + 10*A(x)^6 + 12*A(x)^7 + ... = x.

Crossrefs

Cf. A007296, A018252.

Sequence in context: A368968 A369511 A228966 * A363363 A239295 A274735

Adjacent sequences: A291530 A291531 A291532 * A291534 A291535 A291536

Keyword

sign

Author

Ilya Gutkovskiy, Aug 25 2017

Status

approved