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Search: id:A052104
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| A052104 |
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Numerators of coefficients in function a(x) such that a(a(x)) = exp(x) - 1. |
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+0
4
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| 0, 1, 1, 1, 0, 1, -7, 1, 53, -281, -1231, 87379, -13303471, -54313201, 10142361989, 2821265977, -10502027401553, 1836446156249, 2952828271088741, -1004826382596003137, -7006246797736924249, 14607119841651449406947, 1868869263315549659372569
(list; graph; listen)
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OFFSET
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0,7
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REFERENCES
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R. P. Stanley, Enumerative Combinatorics, Cambridge, Vol. 2, 1999; see Problem 6.52.
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EXAMPLE
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x+1/4*x^2+1/48*x^3+1/3840*x^5-7/92160*x^6+1/645120*x^7+...
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CROSSREFS
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Cf. A052105, A052122, A052123.
Sequence in context: A038267 A027466 A075502 this_sequence A144450 A051339 A134141
Adjacent sequences: A052101 A052102 A052103 this_sequence A052105 A052106 A052107
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KEYWORD
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sign,nice,easy,frac
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 22 2000
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