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A013391
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-arctan(sin(x)-arctanh(x))=3/3!*x^3+23/5!*x^5+721/7!*x^7+25199/9!*x^9...
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0
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0, 3, 23, 721, 25199, 1716121, 141920855, 20103619537, 4016386229855, 1241116799607721, 494609567396520071, 244232906612554953633, 140315440295583485315151, 92810530303082004433849401
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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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With[{nn=30}, Take[CoefficientList[Series[-ArcTan[Sin[x]-ArcTanh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Ray Chandler, Nov 29 2016 *)
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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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