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A013519
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Numerator of [x^(2n+1)] in the Taylor expansion tan(cosec(x)-cot(x)) = x/2 +x^3/12 +3*x^5/160 +181*x^7/40320 +59*x^9/53760 +3455*x^11/12773376 +...
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0
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1, 1, 3, 181, 59, 3455, 3332389, 173339393, 449509681, 198232237033, 1032475444411, 101635950910031, 71432133543444211, 671713726985602398481
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| The e.g.f. of x/2, tan(cosec(x)-cot(x)) = x/(2^1*1!) + 4*x^3/(2^3*3!) +72*x^5/(2^5*5!) + 2896*x^7/(2^7*7!) +.. is apparently covered by A003718.
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CROSSREFS
| Sequence in context: A198446 A093434 A053291 * A042779 A103503 A203562
Adjacent sequences: A013516 A013517 A013518 * A013520 A013521 A013522
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KEYWORD
| nonn,frac
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AUTHOR
| Patrick Demichel (patric.demichel(AT)hp.com)
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EXTENSIONS
| Values replaced by numerators. - R. J. Mathar, Dec 19 2011
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