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A013524
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Numerator of [x^(2n+1)] of the Taylor expansion tanh(cosec(x)-cot(x))= x/2 -x^5/480 -x^7/5760 -x^9/1451520 +13*x^11/9676800 +7951*x^13/49816166400 +...
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0
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1, 0, -1, -1, -1, 13, 7951, 21599, -294997, -275833, -60527057, -6338125867, 37620769159, 10425684579701
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,6
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COMMENTS
| The e.g.f. of x/2, tanh(cosec(x)-cot(x)) = x/(2^1*1!) -8*x^5/(2^5*5!) -112*x^7/(2^7*7!) -128*x^9/(2^9*9!) +109824*x^11/(2^11*11!) +... is (up to signs) apparently provided by A003721.
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CROSSREFS
| Sequence in context: A032463 A203585 A191937 * A060887 A020521 A205162
Adjacent sequences: A013521 A013522 A013523 * A013525 A013526 A013527
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KEYWORD
| sign,frac
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AUTHOR
| Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
| Values replaced by numerators. - R. J. Mathar, Dec 19 2011
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