|
| |
|
|
A012242
|
|
log(cos(tanh(x)))=-1/2!*x^2+6/4!*x^4-72/6!*x^6+1456/8!*x^8...
|
|
0
|
|
|
|
-1, 6, -72, 1456, -47104, 2390784, -180612096, 18625189888, -2431403622400, 384624656646144, -72343735465672704, 16067422146130345984, -4193787904779561730048, 1276366494840535652499456
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
Table of n, a(n) for n=0..13.
|
|
|
MATHEMATICA
|
With[{nn=30}, Take[CoefficientList[Series[Log[Cos[Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, May 27 2014 *)
|
|
|
CROSSREFS
|
Sequence in context: A052730 A010796 A038095 * A138446 A099029 A120331
Adjacent sequences: A012239 A012240 A012241 * A012243 A012244 A012245
|
|
|
KEYWORD
|
sign
|
|
|
AUTHOR
|
Patrick Demichel (patrick.demichel(AT)hp.com)
|
|
|
STATUS
|
approved
|
| |
|
|
