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A009358
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Expansion of ln(1+sinh(x)*cosh(x)).
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1
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0, 1, -1, 6, -22, 120, -856, 7056, -68272, 758400, -9452416, 130918656, -1995427072, 33173038080, -597434776576, 11587651270656, -240801628444672, 5337660866396160, -125710803524878336, 3134856182239789056
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| Harvey P. Dale, Table of n, a(n) for n = 0..500
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MATHEMATICA
| With[{nn=20}, CoefficientList[Series[Log[1+Sinh[x]* Cosh[x]], {x, 0, nn}], x]Range[0, nn]!] (* From Harvey P. Dale, Sep 30 2011 *)
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CROSSREFS
| Sequence in context: A179601 A151495 A193463 * A002137 A009361 A193445
Adjacent sequences: A009355 A009356 A009357 * A009359 A009360 A009361
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KEYWORD
| sign,easy
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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EXTENSIONS
| Extended with signs Mar 15 1997 by Olivier Gerard.
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