A202522 Denominator of the coefficient of [x^(2n)] of the Taylor series log(cosec(x)*arcsinh(x)).

15, 30, 1134, 17010, 364864500, 547296750, 390769879500, 976924698750, 58468943220187500, 17540682966056250, 3234019037547375000, 1397904728979852843750, 1054020165650809044187500, 10163765883061372926093750, 3396527282801449604442009375000, 2547395462101087203331507031250

Offset

2,1

Links

Table of n, a(n) for n=2..17.

Example

x^4/15 - x^6/30 + 25*x^8/1134 - 269*x^10/17010 + 4401359*x^12/364864500 - ...

Crossrefs

Cf. A012859 (numerators).

Sequence in context: A254859 A127526 A249764 * A054305 A362986 A041442

Adjacent sequences: A202519 A202520 A202521 * A202523 A202524 A202525

Keyword

nonn,frac

Author

R. J. Mathar, Dec 20 2011

Status

approved