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A013540 Numerator of the coefficient [x^(2n+1)] of the Taylor series arctan(cosec(x)-coth(x))= -x/6 +7*x^3/162 -17*x^5/13608 +913*x^7/1224720 -93959*x^9/1745960832 +... 0
-1, 7, -17, 913, -93959, 9405719, -8909477, 211410621413, -6740064210937, 2805742760628347, -761503407533329723, 340317674208644677253, -38791272133810800467, 1468818906393936912860264741 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A159028 A102266 A113765 * A153375 A001145 A093139

Adjacent sequences:  A013537 A013538 A013539 * A013541 A013542 A013543

KEYWORD

sign,frac

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Values replaced by numerators. - R. J. Mathar, Dec 21 2011

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Last modified February 16 19:23 EST 2012. Contains 205945 sequences.