%I #9 May 30 2016 04:35:22
%S 1,48,4320,638400,143216640,45912303360,20064844800000,
%T 11517786190310400,8429182295998464000,7676025035655591014400,
%U 8524944488872455752908800,11353372433362159200000000000,17873609218353722680651284480000,32855463684946243953215776972800000,69770867798960701944675685147607040000
%N a(n) = 8*(6*n^2-37*n+60)*n^(n-7)*(2*n-7)!/(n-4)!.
%H G. C. Greubel, <a href="/A134164/b134164.txt">Table of n, a(n) for n = 4..100</a>
%H S. K. Lando and D. Zvonkine, <a href="http://mi.mathnet.ru/eng/mmj272">Counting ramified coverings and intersection theory on Hurwitz spaces I (cohomological identities)</a>, Moscow Mathematical Journal, vol. 7 (2007), no. 1, 85-107.
%H D. Zvonkine, <a href="http://mi.mathnet.ru/eng/mmj274">Counting ramified coverings and intersection theory on Hurwitz spaces II (local structure of Hurwitz spaces and combinatorial results)</a>, Moscow Mathematical Journal, vol. 7 (2007), no. 1, 135-162.
%H D. Zvonkine, <a href="http://www.math.jussieu.fr/~zvonkine/">Home Page</a>
%t Table[ 8*(6*n^2 - 37*n + 60)*n^(n - 7)*(2*n - 7)!/(n - 4)!, {n, 4, 50}] (* _G. C. Greubel_, May 30 2016 *)
%K nonn
%O 4,2
%A _N. J. A. Sloane_, Jan 30 2008