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A009237
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Expansion of exp(tan(ln(1+x))).
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0
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1, 1, 0, 2, -4, 26, -134, 930, -6728, 53056, -413744, 2752936, -3042040, -488089848, 16658828096, -442856699584, 11075864697536, -274957302952960, 6922538197811392, -178529204224920384, 4739350807332125056
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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MATHEMATICA
| With[{nn=30}, CoefficientList[Series[Exp[Tan[Log[1+x]]], {x, 0, nn}], x] Range[0, nn]!] (* From Harvey P. Dale, Oct 26 2011 *)
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CROSSREFS
| Sequence in context: A144691 A085700 A087404 * A019019 A032328 A019034
Adjacent sequences: A009234 A009235 A009236 * A009238 A009239 A009240
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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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