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A012756
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exp(arctanh(x)*arctanh(x))=1+2/2!*x^2+28/4!*x^4+968/6!*x^6+61584/8!*x^8...
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1
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1, 2, 28, 968, 61584, 6221472, 912779712, 183144253056, 48126940270848, 16031131073204736, 6598147635721116672, 3287285755024478177280, 1949289186179973455646720, 1356446896562442205265633280
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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nn = 20; Table[(CoefficientList[Series[E^(ArcTanh[x]^2), {x, 0, 2*nn}], x] * Range[0, 2*nn]!)[[n]], {n, 1, 2*nn+1, 2}] (* Vaclav Kotesovec, Feb 08 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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STATUS
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approved
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