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Search: id:A048608
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| A048608 |
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Denominators of coefficients in function a(x) such that a(a(x)) = ln(1+x). |
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+0
2
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| 1, 4, 48, 96, 3840, 30720, 13440, 2064384, 92897280, 594542592, 130799370240, 1121137459200, 40809403514880, 816188070297600, 48971284217856000, 5484783832399872000, 62160883433865216000, 1918107260244983808000
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Recursion exists for coefficients, but is too complicated to use without a computer algebra system
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REFERENCES
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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.
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EXAMPLE
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x - x^2/4 + x^3 * 5/48 + ...
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CROSSREFS
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Cf. A048607.
Sequence in context: A052105 A010293 A157818 this_sequence A162673 A002287 A127211
Adjacent sequences: A048605 A048606 A048607 this_sequence A048609 A048610 A048611
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KEYWORD
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frac,nonn,nice
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AUTHOR
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Winston C. Yang (yang(AT)math.wisc.edu)
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