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A096717
Numerators of terms in series expansion of arcsin(arctan(x)).
8
1, -1, 13, -341, 18649, -177761, 1087433, -4043494549, 1674761567, -284891766539657, 106410874319325461, -48402125366670946877, 26344930021064765797249, -27048608191991004321089, 6237195766537863970288933, -16102066950215127630856787159, 2258820895862623437612519923989
OFFSET
0,3
LINKS
EXAMPLE
arcsin(arctan(x)) = x - 1/6*x^3 + 13/120*x^5 - 341/5040*x^7 + 18649/362880*x^9 - 177761/4435200*x^11 + ...
MATHEMATICA
Numerator[Take[CoefficientList[Series[ArcSin[ArcTan[x]], {x, 0, 50}], x], {2, -1, 2}]] (* G. C. Greubel, Nov 17 2016 *)
KEYWORD
sign,frac
AUTHOR
N. J. A. Sloane, Aug 15 2004
STATUS
approved