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A012247
exp(sinh(arctan(x)))=1+x+1/2!*x^2-3/4!*x^4-4/5!*x^5+21/6!*x^6...
0
1, 1, 1, 0, -3, -4, 21, 136, 185, -7408, -67159, 644416, 11805621, -84562880, -2380474563, 15811723136, 591392066161, -4005496370944, -181472052075695, 1317763889887232, 68002767860495981
OFFSET
0,5
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Exp[Sinh[ArcTan[x]]], {x, 0, nn}], x]Range[0, nn]!] (* Harvey P. Dale, Dec 11 2012 *)
CROSSREFS
Sequence in context: A182096 A012123 A012255 * A057791 A167452 A375958
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved