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Search: id:A060349
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| A060349 |
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n^(n+2)*(n^2 - 1)*(n + 3)*(n + 2)*(5*n - 7)/5760. |
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+0
2
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| 81, 5824, 328125, 16901136, 847425747, 42630905856, 2186213819427, 115293750000000, 6283133610195442, 354769407810994176, 20781472563720847342, 1263485180096661430272, 79727340621643066406250, 5219469342167970210643968, 354305349685394263423480746
(list; graph; listen)
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OFFSET
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3,1
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COMMENT
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For n >= 3 a(n) is the number of nonequivalent primitive meromorphic functions with one pole of order n on a Riemann surface of genus 2.
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REFERENCES
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B. Shapiro, M.Shapiro and A.Vainshtein - Ramified coverings of S^2 with one degenerate branching point and enumeration of edge-ordered graphs, Amer. Math. Soc. Transl., Vol. 180 (1997), pp. 219-227
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LINKS
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Harry J. Smith, Table of n, a(n) for n=3,...,200
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PROGRAM
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(PARI) { for (n=3, 200, write("b060349.txt", n, " ", n^(n + 2)*(n^2 - 1)*(n + 3)*(n + 2)*(5*n - 7)/5760); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 04 2009]
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CROSSREFS
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Cf. A007830, A060348.
Sequence in context: A053108 A016888 A006312 this_sequence A036354 A016948 A089683
Adjacent sequences: A060346 A060347 A060348 this_sequence A060350 A060351 A060352
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KEYWORD
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nonn
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AUTHOR
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Noam Katz (noamkj(AT)hotmail.com), Mar 30 2001
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