A012871 Numerator of [x^(2n)] in the Taylor expansion log(cot(x)*arctanh(x))= x^4/15 +x^6/15 +317*x^8/5670 +389*x^10/8505 +6895597*x^12/182432250 +...

1, 1, 317, 389, 6895597, 8704831, 10655226077, 1657771289, 613552118040217, 164509043030977, 6761598195684420293, 10768446708299762233, 81775784693678733811, 463196935488177564105193, 41000094641259185671029500461

Offset

2,3

Links

Table of n, a(n) for n=2..16.

Crossrefs

Sequence in context: A253689 A233048 A101112 * A142003 A064396 A243958

Adjacent sequences: A012868 A012869 A012870 * A012872 A012873 A012874

Keyword

nonn,frac

Author

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

Extensions

Values replaced by numerators. - R. J. Mathar, Dec 22 2011

Status

approved