A053552 E.g.f. is obtained by reversion of e.g.f. for A053549.

1, -2, 0, -32, -1000, -61104, -6622448, -1274984320, -444075170688, -286507347953920, -349824570713902592, -821921957328576534528, -3760909487461975276739584, -33794780371666462710538704896, -599695123654141294961479035617280

Offset

1,2

References

R. P. Stanley, Enumerative Combinatorics, Cambridge, Vol. 2, 1999; see Problem 5.20, G^<-1>(x).

Links

Table of n, a(n) for n=1..15.

Index entries for reversions of series

Maple

seriestoseries(G, 'revogf'); # where G is e.g.f. for A053549; i.e. use ordinary reversion on the e.g.f. and treat answer as another e.g.f.

Crossrefs

Sequence in context: A156504 A340545 A009665 * A009548 A172388 A193052

Adjacent sequences: A053549 A053550 A053551 * A053553 A053554 A053555

Keyword

sign

Author

N. J. A. Sloane, Jan 16 2000

Status

approved