A012719 sec(arctanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...

1, 0, 1, 6, 37, 260, 2365, 24850, 301033, 4051848, 60901145, 1003420638, 18072389069, 352027414284, 7390186076949, 166110699895530, 3983896292586577, 101488729722338064, 2737830394817774257

Offset

0,4

Links

Table of n, a(n) for n=0..18.

Crossrefs

Sequence in context: A079751 A088312 A012364 * A300171 A218298 A179515

Adjacent sequences: A012716 A012717 A012718 * A012720 A012721 A012722

Keyword

nonn

Author

Patrick Demichel (patrick.demichel(AT)hp.com)

Status

approved