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A009784
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Expansion of tanh(log(1+x)*cosh(x)).
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1
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0, 1, -1, 3, 0, -65, 525, -3619, 15512, 51549, -2308365, 37073399, -417301896, 2878576779, 13832070161, -1001340728543, 23330589314640, -373263648419975, 3611687964249159, 21971926549737643, -2211581913138852400
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Tanh[Log[1+x]Cosh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 10 2011 *)
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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