A012674 sec(tanh(x)*tan(x)) = 1+12/4!*x^4+14672/8!*x^8+120702912/12!*x^12...

1, 12, 14672, 120702912, 3622154930432, 288623184943967232, 50388328491376236941312, 16943473357578443028001308672, 10004545242456252590707488012173312

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Crossrefs

Sequence in context: A317958 A012608 A012735 * A301533 A013514 A340166

Adjacent sequences: A012671 A012672 A012673 * A012675 A012676 A012677

Keyword

nonn

Author

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

Status

approved