A059440 A diagonal of A059438.

1, 3, 12, 58, 327, 2109, 15366, 125316, 1135329, 11348623, 124359336, 1484796894, 19204214363, 267627706257, 3998828758938, 63777662250440, 1081442839245381, 19426122224995107, 368492543629967292

Offset

3,2

References

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 262 (#14).

Links

Vaclav Kotesovec, Table of n, a(n) for n = 3..400

Formula

G.f.: (1-1/Sum (k! x^k ))^3.

a(n) ~ 3*sqrt(2*Pi) * n^(n - 3/2) / exp(n). - Vaclav Kotesovec, Jun 25 2019

Crossrefs

Sequence in context: A184511 A125276 A001426 * A020075 A020030 A121393

Adjacent sequences: A059437 A059438 A059439 * A059441 A059442 A059443

Keyword

nonn,easy

Author

N. J. A. Sloane, Feb 01 2001

Extensions

More terms from Vladeta Jovovic, Mar 04 2001

Status

approved