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A012823 arcsin(sec(x)*arcsinh(x))=x+3/3!*x^3+53/5!*x^5+1855/7!*x^7... 0
1, 3, 53, 1855, 156425, 19537595, 3987121981, 1087120051511, 408148372272017, 193531749818796403, 116081047496759766725, 84538055378229508493871, 74205177566923695709271961 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A216931 A352992 A012742 * A098932 A100444 A300420

Adjacent sequences:  A012820 A012821 A012822 * A012824 A012825 A012826

KEYWORD

nonn

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified August 19 18:30 EDT 2022. Contains 356229 sequences. (Running on oeis4.)