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A009717
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Expansion of tan(tanh(x))*sin(x).
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1
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0, 2, -4, -42, 1336, -16726, -1194700, 153304830, -10698400400, 188012481362, 107922523124588, -26275693823306202, 3726087789656495272, -203071274271083537926, -64313415452872137435484
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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[Tan[Tanh[x]]*Sin[x], {x, 0, nn}], x] Range[ 0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Jun 14 2019 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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