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A012126 arctan(arcsin(tanh(x)))=x-3/3!*x^3+49/5!*x^5-1971/7!*x^7+147457/9!*x^9... 0
1, -3, 49, -1971, 147457, -17712131, 3119521521, -757475512691, 242537719364737, -99014166389423235, 50196880291533920305, -30939568726951088808371, 22784988607303653453394305 (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: A012059 A012166 A012068 * A203513 A012040 A012223

Adjacent sequences:  A012123 A012124 A012125 * A012127 A012128 A012129

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified October 23 04:06 EDT 2021. Contains 348211 sequences. (Running on oeis4.)