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Search: id:A048607
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| A048607 |
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Numerators 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, -1, 5, -5, 109, -497, 127, -11569, 312757, -1219255, 165677473, -885730939, 20163875141, -252312616027, 9565074633871, -691138954263097, 5061676927076641, -95993669516238563, 1245671625068799013
(list; graph; listen)
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OFFSET
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0,3
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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. A048608.
Sequence in context: A129358 A081050 A081049 this_sequence A094463 A055928 A051716
Adjacent sequences: A048604 A048605 A048606 this_sequence A048608 A048609 A048610
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KEYWORD
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frac,sign,nice
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AUTHOR
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Winston C. Yang (yang(AT)math.wisc.edu)
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