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Search: id:A052139
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| A052139 |
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Denominators of coefficients in function a(x) such that a(a(a(x))) = log (1+x). |
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+0
2
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| 1, 6, 18, 216, 9720, 9720, 1224720, 29393280, 18895680, 1984046400, 32736765600, 392841187200, 183849675609600, 4211828932147200, 25738954585344000, 8339421285651456000, 21265524278411212800, 437462213727316377600
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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W. C. Yang, Composition equations, preprint, 1999.
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FORMULA
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a(x)=sum_{n=1,2,3..} A052138(n)/A052139(n)*x^n. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 21 2007
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CROSSREFS
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Cf. A052138. See also A048602, A048603, etc.
Sequence in context: A077531 A052634 A059944 this_sequence A052682 A130437 A119813
Adjacent sequences: A052136 A052137 A052138 this_sequence A052140 A052141 A052142
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KEYWORD
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nonn,frac,easy,nice
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AUTHOR
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njas, Jan 22 2000
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 21 2007
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