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A009726
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Expansion of tan(x)*cos(log(1+x)).
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0
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0, 1, 0, -1, 12, -54, 360, -2094, 15568, -113516, 979200, -8587668, 84989520, -863430840, 9562970144, -108058865368, 1285366485120, -15130564865136, 174638241040896, -1701739763904144, 7392841627579840, 326394843481495456
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OFFSET
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0,5
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LINKS
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MATHEMATICA
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Tan[ x ]*Cos[ Log[ 1+x ] ]
CoefficientList[Series[Cos[Log[1 + x]]*Tan[x], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *)
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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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