login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A013541 Numerator of the coefficient [x^(2n)] of the Taylor series cos(cosec(x)-coth(x))= 1 -x^2/72 +217*x^4/31104 -214279*x^6/235146240 +824071*x^8/9674588160 -... 1
1, -1, 217, -214279, 824071, -337533513773, 8320611986431, -2303253020856673, 7111553692366818727, -4825610634542923917792887, 6031202702741413913839327, -1707209475196496091030335944673 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

Most (but not all) denominators are in the bisection of A202382.

CROSSREFS

Sequence in context: A086026 A100794 A048258 * A167912 A038662 A121379

Adjacent sequences:  A013538 A013539 A013540 * A013542 A013543 A013544

KEYWORD

sign,frac

AUTHOR

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

EXTENSIONS

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 18:41 EST 2012. Contains 206074 sequences.