|
|
A012657
|
|
E.g.f.: sec(tanh(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+90/6!*x^6-420/7!*x^7...
|
|
0
|
|
|
1, 0, 0, 0, 12, -60, 90, -420, 19040, -245952, 1660680, -12025200, 266431176, -5435780064, 74009711776, -910402889760, 17440536006400, -420186078195584, 8609810161550016, -157606804730862720
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,5
|
|
LINKS
|
|
|
MATHEMATICA
|
With[{nn=20}, CoefficientList[Series[Sec[Tanh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 03 2014 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
Patrick Demichel (patrick.demichel(AT)hp.com)
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|