|
| |
|
|
A013528
|
|
Numerator of [x^(2n)] of the Taylor series sech(cosec(x)-cot(x))= 1 -x^2/8 -x^4/128 +x^6/15360 +19*x^8/294912 +25031*x^10/3715891200+...
|
|
0
| |
|
|
1, -1, -1, 1, 19, 25031, 18421, -622177, -283401163, -24826632949, -2243454779, 4882905709651, 43798187793808543, -46704901267812186793, -5325187532598955153807
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,5
|
|
|
COMMENTS
| The e.g.f. related to x/2, sech(cosec(x)-cot(x)) = 1 -1*x^2/(2^2*2!) -3*x^4*(2^4*4!) +3*x^6/(2^6*6!) +665*x^8/(2^8*8!) +.. is (up to signs) apparently provided by A009011.
|
|
|
CROSSREFS
| Sequence in context: A107100 A203581 A125043 * A172762 A203703 A068734
Adjacent sequences: A013525 A013526 A013527 * A013529 A013530 A013531
|
|
|
KEYWORD
| sign,frac
|
|
|
AUTHOR
| Patrick Demichel (patrick.demichel(AT)hp.com)
|
|
|
EXTENSIONS
| Values replaced by numerators. - R. J. Mathar, Dec 20 2011
|
| |
|
|
