OFFSET
0,4
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..557
FORMULA
a(n) = Sum_{k=0..n} (-k)^(n-k)*binomial(n, k). - Vladeta Jovovic, Mar 15 2003
First column of A215652. - Peter Bala, Sep 14 2012
G.f.: Sum_{k>=0} x^k/(1 + k*x)^(k+1). - Ilya Gutkovskiy, Jun 25 2018
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Exp[x Exp[-x]], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Oct 20 2011 *)
PROG
(PARI) Vec(serlaplace(exp(exp(-x) * x))) \\ Charles R Greathouse IV, Sep 26 2017
CROSSREFS
KEYWORD
sign,easy
AUTHOR
STATUS
approved