|
|
A012049
|
|
sec(sin(tanh(x))) = 1+1/2!*x^2-7/4!*x^4+73/6!*x^6+209/8!*x^8...
|
|
1
|
|
|
1, 1, -7, 73, 209, -144271, 16935049, -1681509255, 121927140641, 7429711841377, -7368737635468135, 2672443484700215337, -714451608564077085455, 102412390388191040345041, 45342663705298790615837737, -56227306534265498361644426407
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
MATHEMATICA
|
With[{nn=40}, Take[CoefficientList[Series[Sec[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Sep 25 2013 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
Patrick Demichel (patrick.demichel(AT)hp.com)
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|