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Search: id:A060348
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| 9, 160, 3125, 68040, 1647086, 44040192, 1291401630, 41250000000, 1426558353055, 53125098504192, 2120125746145771, 90285055457658880, 4087009643554687500, 195996655783163985920, 9926883142636041170124, 529537075346699234869248
(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 1.
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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("b060348.txt", n, " ", n^n * (n^2 - 1)/24); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 04 2009]
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CROSSREFS
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Cf. A007830, A060349.
Sequence in context: A012148 A109677 A024122 this_sequence A062232 A020523 A023039
Adjacent sequences: A060345 A060346 A060347 this_sequence A060349 A060350 A060351
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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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