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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
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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
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Last modified September 17 19:34 EDT 2024. Contains 375990 sequences. (Running on oeis4.)