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A009267
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Expansion of exp(tanh(x)*cos(x)).
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0
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1, 1, 1, -4, -19, -8, 397, 1752, -7943, -117312, -64551, 7882624, 43466469, -537535360, -7570028763, 27307332608, 1224976528753, 2518262718464, -203222727578703, -1691557864632320, 33945910273599581, 611413449329426432
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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[Exp[Tanh[x]*Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 07 2021 *)
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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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