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A012015
arcsinh(sin(tan(x)))=x-4/5!*x^5-192/7!*x^7-7600/9!*x^9-507136/11!*x^11...
0
1, 0, -4, -192, -7600, -507136, -40159040, -4621348864, -627047126784, -113424912867328, -23612736247718912, -6196586681702039552, -1827473399583593672704, -652336666072894806360064
OFFSET
0,3
CROSSREFS
Sequence in context: A172809 A123116 A163839 * A012102 A274304 A299999
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved