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A013481
sech(cos(x)-cosh(x)) = 1-12/4!*x^4+8288/8!*x^8-39475392/12!*x^12...
0
1, -12, 8288, -39475392, 689369608448, -32038788679636992, 3265606511334528831488, -641363922266872095050022912
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..7.
CROSSREFS
Sequence in context:
A201493
A009173
A012531
*
A013513
A013480
A107254
Adjacent sequences:
A013478
A013479
A013480
*
A013482
A013483
A013484
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified May 26 22:32 EDT 2024. Contains 372847 sequences. (Running on oeis4.)