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A009243
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Expansion of exp(tan(x))*x.
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0
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0, 1, 2, 3, 12, 45, 222, 1239, 7672, 54873, 416410, 3577739, 32324292, 322495173, 3382216502, 38370542175, 457713511280, 5817952885169, 77686268202162, 1093812528874387, 16145162631579900, 249472828725529437, 4030053480328871182, 67807763939709678951
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OFFSET
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0,3
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LINKS
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Table of n, a(n) for n=0..23.
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Exp[Tan[x]]*x, {x, 0, nn}], x] Range[ 0, nn]!] (* Harvey P. Dale, Nov 26 2012 *)
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CROSSREFS
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Sequence in context: A012516 A012306 A012312 * A232864 A307957 A307956
Adjacent sequences: A009240 A009241 A009242 * A009244 A009245 A009246
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KEYWORD
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nonn,easy
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AUTHOR
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R. H. Hardin
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EXTENSIONS
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Extended and signs tested by Olivier Gérard, Mar 15 1997
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STATUS
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approved
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