OFFSET
0,3
LINKS
N. J. A. Sloane, Transforms
FORMULA
a(n) ~ n^n / cos(1). - Vaclav Kotesovec, Jun 08 2019
MATHEMATICA
Table[n! SeriesCoefficient[Exp[n x]/Cos[x], {x, 0, n}], {n, 0, 19}]
Table[(2 I)^n EulerE[n, (1 - I n)/2], {n, 0, 19}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Apr 10 2018
STATUS
approved