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A013372
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arctan(sin(x)-sinh(x)) = -2/3!*x^3 - 2/7!*x^7 + 4480/9!*x^9 - 2/11!*x^11 + ...
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0
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-2, 0, -2, 4480, -2, 274560, -1076275202, 20650240, -595948953602, 3337315890251520, -317541467443202, 8443404916271478400, -61468170244569234432002, 17796778320664208810880, -497337594356972616069888002, 4456181603844910120400213608960
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OFFSET
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3,1
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LINKS
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MATHEMATICA
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With[{nn=40}, Take[CoefficientList[Series[ArcTan[Sin[x]-Sinh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {4, -1, 2}]] (* Harvey P. Dale, Oct 11 2012 *)
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CROSSREFS
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KEYWORD
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sign
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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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