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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
OFFSET
0,2
CROSSREFS
Sequence in context: A012059 A012166 A012068 * A203513 A012040 A012223
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved