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A013067
sech(sinh(x)+arctan(x))=1-4/2!*x^2+88/4!*x^4-5014/6!*x^6...
0
1, -4, 88, -5014, 538376, -93064954, 23605179172, -8256285769398, 3808207305952112, -2239609649656903474, 1635640402649689743132, -1452319030188781207688526, 1540754005662731974429453160
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..12.
CROSSREFS
Sequence in context:
A296465
A012946
A013101
*
A012996
A195373
A065754
Adjacent sequences:
A013064
A013065
A013066
*
A013068
A013069
A013070
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)