|
| |
|
|
A012202
|
|
sech(arctan(arcsin(x)))=1-1/2!*x^2+9/4!*x^4-249/6!*x^6+11953/8!*x^8...
|
|
0
|
|
|
|
1, -1, 9, -249, 11953, -992401, 115133433, -19289685193, 4104153335777, -1154213252748193, 390283459641717353, -165544701587974757145, 81456402896849322863505, -48584594120969426596224305
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
|
|
|
MATHEMATICA
|
With[{nn=30}, Take[CoefficientList[Series[Sech[ArcTan[ArcSin[x]]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Apr 08 2018 *)
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
sign
|
|
|
AUTHOR
|
Patrick Demichel (patrick.demichel(AT)hp.com)
|
|
|
STATUS
|
approved
|
| |
|
|
