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A013526
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Numerator of [x^(2n)] of the Taylor expansion cosh(cosec(x)-cot(x))=1 +x^2/8 +3*x^4/128 +59*x^6/15360 +871*x^8/1474560 +....
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1, 1, 3, 59, 871, 325249, 35797, 24362249, 342232522657, 8224154352439, 23157229065769, 9926476934520521, 37638416003805990839, 296699416391356495667713, 691054566545631371393
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| The coefficients of the e.g.f of x/2, cosh(cosec(x)-cot(x)) = 1 +1*x^2/(2^2*2!) + 9*x^4/(2^4*4!) +177*x^6/(2^6*6!) +6097*x^8/(2^8*8!)+.. are apparently the absolute values of A003711.
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CROSSREFS
| Sequence in context: A057175 A142642 A201850 * A062629 A184953 A201184
Adjacent sequences: A013523 A013524 A013525 * A013527 A013528 A013529
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KEYWORD
| nonn,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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