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Search: id:A012833
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A012833 sech(sec(x)*arcsinh(x))=1-1/2!*x^2-3/4!*x^4-45/6!*x^6+2457/8!*x^8... +0
2
1, -1, -3, -45, 2457, -36825, 12566037, -1732392389, 313988548273, -92368244011185, 30231378922437805, -12317648529216417629, 6168347852710380187977, -3616136826996686827399305 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Sequence in context: A012780 A072503 A117253 this_sequence A012747 A027637 A099168

Adjacent sequences: A012830 A012831 A012832 this_sequence A012834 A012835 A012836

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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