A013358 sec(sin(x)-tan(x))=1+90/6!*x^6+2520/8!*x^8+126630/10!*x^10...

1, 0, 0, 90, 2520, 126630, 14717340, 1887655770, 305757138960, 67501799476110, 18267050784481380, 5925845719351577250, 2313597977247058464600, 1064286603125099115824790

Offset

0,4

Links

Table of n, a(n) for n=0..13.

Crossrefs

Sequence in context: A013359 A013355 A013357 * A013414 A013413 A013411

Adjacent sequences: A013355 A013356 A013357 * A013359 A013360 A013361

Keyword

nonn

Author

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

Status

approved