|
| |
|
|
A060348
|
|
n^n * (n^2 - 1)/24.
|
|
3
| |
|
|
9, 160, 3125, 68040, 1647086, 44040192, 1291401630, 41250000000, 1426558353055, 53125098504192, 2120125746145771, 90285055457658880, 4087009643554687500, 195996655783163985920, 9926883142636041170124, 529537075346699234869248
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 3,1
|
|
|
COMMENTS
| 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.
|
|
|
REFERENCES
| 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
|
|
|
LINKS
| Harry J. Smith, Table of n, a(n) for n=3,...,200
|
|
|
PROG
| (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]
|
|
|
CROSSREFS
| Cf. A007830, A060349.
Sequence in context: A183471 A109677 A024122 * A062232 A020523 A023039
Adjacent sequences: A060345 A060346 A060347 * A060349 A060350 A060351
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Noam Katz (noamkj(AT)hotmail.com), Mar 30 2001
|
| |
|
|
