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A012223 arcsin(arctan(tanh(x)))=x-3/3!*x^3+49/5!*x^5-2139/7!*x^7+181921/9!*x^9... 0
1, -3, 49, -2139, 181921, -25347539, 5231635473, -1498270773419, 568381637171521, -275844413823596835, 166680279670474243825, -122705715387723016322939, 108112687783657068510670305 (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: 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

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Last modified October 25 23:17 EDT 2020. Contains 338026 sequences. (Running on oeis4.)