A012522 sec(sinh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+33/4!*x^4+220/5!*x^5...

1, 0, 1, 6, 33, 220, 1857, 18578, 210497, 2666808, 37529089, 581350110, 9823649121, 179778809236, 3542606470977, 74792059538282, 1684263304319105, 40298130761503344, 1020885056930919937

Offset

0,4

Links

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

Crossrefs

Sequence in context: A097662 A366200 A277485 * A012326 A277260 A112903

Adjacent sequences: A012519 A012520 A012521 * A012523 A012524 A012525

Keyword

nonn

Author

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

Status

approved