|
|
A048606
|
|
Numerators of coefficients in function a(x) such that a(a(x)) = sinh(x).
|
|
2
|
|
|
1, 1, -1, 53, -23, 92713, -742031, -594673187, 329366540401, -104491760828591, 1508486324285153, 582710832978168221, -1084662989735717135537, 431265609837882130202597, 784759327625761394688977441
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
COMMENTS
|
A recursion exists for coefficients, but is too complicated to use without a computer algebra system.
|
|
REFERENCES
|
W. C. Yang, Polynomials are essentially integer partitions, preprint, 1999
W. C. Yang, Composition equations, preprint, 1999
|
|
LINKS
|
|
|
EXAMPLE
|
x + x^3/12 - x^5/160 + ...
|
|
CROSSREFS
|
|
|
KEYWORD
|
frac,sign,nice
|
|
AUTHOR
|
Winston C. Yang (yang(AT)math.wisc.edu)
|
|
STATUS
|
approved
|
|
|
|