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A012807
sinh(sec(x)*arctan(x))=x+2/3!*x^3+40/5!*x^5+576/7!*x^7+46208/9!*x^9...
0
1, 2, 40, 576, 46208, 1293184, 309637120, 5786437632, 7315622592512, -347058934743040, 483735262691819520, -91992936989187702784, 74923051609806418739200, -28841683494637052911157248
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..13.
CROSSREFS
Sequence in context:
A180429
A108033
A160229
*
A127186
A139747
A230133
Adjacent sequences:
A012804
A012805
A012806
*
A012808
A012809
A012810
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved
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Last modified April 24 13:07 EDT 2024. Contains 371945 sequences. (Running on oeis4.)