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Search: id:A134176
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| A134176 |
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(3/8)*(n-1)*(n-2)*(27*n^2-137*n+180). |
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+0
1
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| 0, 0, 9, 144, 765, 2475, 6120, 12789, 23814, 40770, 65475, 99990, 146619, 207909, 286650, 385875, 508860, 659124, 840429, 1056780, 1312425, 1611855, 1959804, 2361249, 2821410, 3345750, 3939975, 4610034, 5362119, 6202665, 7138350, 8176095, 9323064, 10586664
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OFFSET
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1,3
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REFERENCES
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Zvonkine D., Counting ramified coverings and intersection theory on Hurwitz spaces II (local structure of Hurwitz spaces and combinatorial results). Moscow Mathematical Journal, vol. 7 (2007), no. 1, 135-162.
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LINKS
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D. Zvonkine, Home Page
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FORMULA
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O.g.f.: 9*x^3*(1+11*x+15*x^2)/(1-x)^5 . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 01 2008
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CROSSREFS
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Sequence in context: A083084 A050787 A017198 this_sequence A067415 A069134 A034829
Adjacent sequences: A134173 A134174 A134175 this_sequence A134177 A134178 A134179
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 30 2008
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