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A012719
sec(arctanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...
0
1, 0, 1, 6, 37, 260, 2365, 24850, 301033, 4051848, 60901145, 1003420638, 18072389069, 352027414284, 7390186076949, 166110699895530, 3983896292586577, 101488729722338064, 2737830394817774257
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OFFSET
0,4
LINKS
Table of n, a(n) for n=0..18.
CROSSREFS
Sequence in context:
A079751
A088312
A012364
*
A300171
A218298
A179515
Adjacent sequences:
A012716
A012717
A012718
*
A012720
A012721
A012722
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified May 21 16:27 EDT 2024. Contains 372738 sequences. (Running on oeis4.)