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A012674 sec(tanh(x)*tan(x)) = 1+12/4!*x^4+14672/8!*x^8+120702912/12!*x^12... 0
1, 12, 14672, 120702912, 3622154930432, 288623184943967232, 50388328491376236941312, 16943473357578443028001308672, 10004545242456252590707488012173312 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A317958 A012608 A012735 * A301533 A013514 A125547

Adjacent sequences:  A012671 A012672 A012673 * A012675 A012676 A012677

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified October 26 00:28 EDT 2020. Contains 338026 sequences. (Running on oeis4.)