|
Search: id:A048606
|
|
|
| A048606 |
|
Numerators of coefficients in function a(x) such that a(a(x)) = sinh x. |
|
+0
3
|
|
| 1, 1, -1, 53, -23, 92713, -742031, -594673187, 329366540401, -104491760828591, 1508486324285153, 582710832978168221, -1084662989735717135537, 431265609837882130202597, 784759327625761394688977441
(list; graph; listen)
|
|
|
OFFSET
|
0,4
|
|
|
COMMENT
|
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
W. C. Yang, Derivatives are essentially integer partitions, Discrete Math., 222 (2000), 235-245.
|
|
EXAMPLE
|
x + x^3/12 - x^5/160 + ...
|
|
CROSSREFS
|
Cf. A048603. Apart from signs, the same sequence as A048602.
Sequence in context: A051320 A078681 A048602 this_sequence A033373 A104936 A109648
Adjacent sequences: A048603 A048604 A048605 this_sequence A048607 A048608 A048609
|
|
KEYWORD
|
frac,sign,nice
|
|
AUTHOR
|
Winston C. Yang (yang(AT)math.wisc.edu)
|
|
|
Search completed in 0.002 seconds
|
