OFFSET
0,2
COMMENTS
The n-th term of the n-th binomial transform of A006882.
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..250
N. J. A. Sloane, Transforms
FORMULA
a(n) ~ c * n^n, where c = 1 + exp(1/2) * (1 + sqrt(Pi/2) * erf(1/sqrt(2))) = 4.0594074053425761445394754992332... - Vaclav Kotesovec, Aug 21 2018
MATHEMATICA
Table[n! SeriesCoefficient[Exp[n x] (1 + Exp[x^2/2] x (1 + Sqrt[Pi/2] Erf[x/Sqrt[2]])), {x, 0, n}], {n, 0, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Nov 14 2017
STATUS
approved