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A012072 cosh(arcsin(arcsin(x)))=1+1/2!*x^2+9/4!*x^4+249/6!*x^6+14129/8!*x^8... 0
1, 1, 9, 249, 14129, 1362961, 200409465, 41812246345, 11765081428705, 4298599985014945, 1980239469431883625, 1123437678322006300185, 769950079011855688807185, 627326819278687159338591665 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Sequence in context: A289551 A012202 A012098 * A007408 A066989 A249593

Adjacent sequences:  A012069 A012070 A012071 * A012073 A012074 A012075

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified January 23 21:56 EST 2022. Contains 350515 sequences. (Running on oeis4.)