A012126 arctan(arcsin(tanh(x)))=x-3/3!*x^3+49/5!*x^5-1971/7!*x^7+147457/9!*x^9...

1, -3, 49, -1971, 147457, -17712131, 3119521521, -757475512691, 242537719364737, -99014166389423235, 50196880291533920305, -30939568726951088808371, 22784988607303653453394305

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