A012871 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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 (list; graph; refs; listen; history; text; internal format)

	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`

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 10 02:09 EST 2022. Contains 358712 sequences. (Running on oeis4.)