A012582 sec(arcsinh(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+210/6!*x^6-1260/7!*x^7...

1, 0, 0, 0, 12, -60, 210, -1260, 21168, -260064, 2442120, -26091120, 411273192, -6914670048, 106449907200, -1707861486240, 32324814763008, -667333358292864, 13774375825919424, -293275396792404864

Offset

0,5

Links

Table of n, a(n) for n=0..19.

Crossrefs

Sequence in context: A009148 A012581 A012288 * A260356 A120571 A086950

Adjacent sequences: A012579 A012580 A012581 * A012583 A012584 A012585

Keyword

sign

Author

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

Status

approved