A012223 arcsin(arctan(tanh(x)))=x-3/3!*x^3+49/5!*x^5-2139/7!*x^7+181921/9!*x^9...

1, -3, 49, -2139, 181921, -25347539, 5231635473, -1498270773419, 568381637171521, -275844413823596835, 166680279670474243825, -122705715387723016322939, 108112687783657068510670305

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Crossrefs

Sequence in context: A012126 A203513 A012040 * A012100 A106842 A298697

Adjacent sequences: A012220 A012221 A012222 * A012224 A012225 A012226

Keyword

sign

Author

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

Status

approved