A050394 Exponential reversion of partitions into distinct parts A000009.

1, -1, 1, 3, -38, 234, -586, -9493, 194906, -1981880, 4724642, 301409600, -7840250579, 102256372812, -9254171165, -39936103724491, 1199830608004118, -17733202003472076, -96125957089130420

Offset

1,4

Links

Table of n, a(n) for n=1..19.

N. J. A. Sloane, Transforms

Index entries for reversions of series

Mathematica

length = 20; Range[length]! InverseSeries[Sum[PartitionsQ[n] x^n/n!, {n, 1, length}] + O[x]^(length+1)][[3]] (* Vladimir Reshetnikov, Nov 07 2015 *)

Crossrefs

Cf. A050393.

Sequence in context: A129122 A345688 A002405 * A281798 A156071 A199025

Adjacent sequences: A050391 A050392 A050393 * A050395 A050396 A050397

Keyword

sign

Author

Christian G. Bower, Nov 15 1999

Status

approved