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A012348
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arctanh(arcsin(x)*arcsin(x))=2/2!*x^2+8/4!*x^4+368/6!*x^6+18048/8!*x^8...
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0
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0, 2, 8, 368, 18048, 2068992, 306585600, 69776517120, 20465184768000, 7935055273328640, 3823692307188940800, 2274500815301011046400, 1624840840672099644211200, 1378125905023775157056962560
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OFFSET
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0,2
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LINKS
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FORMULA
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MATHEMATICA
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nn = 20; Table[(CoefficientList[Series[ArcTanh[ArcSin[x]^2], {x, 0, 2*nn}], x] * Range[0, 2*nn]!)[[n]], {n, 1, 2*nn+1, 2}] (* Vaclav Kotesovec, Feb 05 2015 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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STATUS
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approved
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