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A013055
sech(sinh(x)+tan(x))=1-4/2!*x^2+56/4!*x^4-1798/6!*x^6+107880/8!*x^8...
0
1, -4, 56, -1798, 107880, -10378106, 1464480244, -284901103638, 73088762562608, -23906588709686578, 9710588243080306892, -4795485037260052060974, 2829543191798552453252232
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..12.
CROSSREFS
Sequence in context:
A261747
A111849
A009159
*
A243486
A322733
A012983
Adjacent sequences:
A013052
A013053
A013054
*
A013056
A013057
A013058
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified September 17 22:44 EDT 2024. Contains 375991 sequences. (Running on oeis4.)