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A012033
sech(sin(sinh(x)))=1-1/2!*x^2+5/4!*x^4-13/6!*x^6-407/8!*x^8...
0
1, -1, 5, -13, -407, 30151, -1142483, 19202427, 3747342929, -722092683505, 76341208430549, -2313301317273981, -1769780901329435719, 628518840135423728599, -125498832189487922441219
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..14.
CROSSREFS
Sequence in context:
A067135
A122900
A145557
*
A007540
A290171
A157250
Adjacent sequences:
A012030
A012031
A012032
*
A012034
A012035
A012036
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)