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A012143 cosh(arcsin(arctanh(x)))=1+1/2!*x^2+13/4!*x^4+469/6!*x^6+33433/8!*x^8... 0
1, 1, 13, 469, 33433, 3984681, 718210725, 183013440765, 62801454477105, 27970921286867025, 15708198897246520125, 10866653910101298549285, 9083998201236955132833225, 9030162506735790711308044665 (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: A197234 A262570 A012073 * A173403 A220560 A033983

Adjacent sequences:  A012140 A012141 A012142 * A012144 A012145 A012146

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified December 1 16:07 EST 2021. Contains 349430 sequences. (Running on oeis4.)