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A009652
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Expansion of tan(log(1+x)/cos(x)).
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1
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0, 1, -1, 7, -24, 215, -1515, 16721, -176568, 2363165, -32662125, 521810859, -8824531056, 165050184611, -3283420714119, 70591429387077, -1610563051907280, 39183483858949049, -1007242998864835257
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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=20}, CoefficientList[Series[Tan[Log[1+x]/Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Feb 05 2012 *)
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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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