A037247 Reversion of g.f. (beginning with x term) for number of trees with n nodes.

1, -1, 1, -2, 5, -13, 35, -98, 282, -832, 2505, -7662, 23715, -74104, 233429, -740511, 2363816, -7587409, 24473880, -79289278, 257890856, -841789791, 2756618710, -9053837032, 29817032534, -98441372386, 325753459625, -1080250590778

Offset

0,4

Links

Table of n, a(n) for n=0..27.

Index entries for reversions of series

Index entries for sequences related to trees

Crossrefs

Cf. A000055, A007315.

Sequence in context: A059027 A025198 A221205 * A308273 A126221 A107086

Adjacent sequences: A037244 A037245 A037246 * A037248 A037249 A037250

Keyword

sign

Author

N. J. A. Sloane.

Extensions

Signs corrected Dec 24 2001

Status

approved