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%I
%S 0,15,28,135,132,455,360,1071,760,2079,1380,3575,2268,5655,3472,8415,
%T 5040,11951,7020,16359,9460,21735,12408,28175,15912,35775,20020,44631,
%U 24780,54839,30240,66495,36448
%N Numerator of n*(n-2)*(2*n-1)/(2*(n-1)).
%F G.f. x^3(x^6+5x^4+20x^3+75x^2+28x+15)/(x-1)^4/(x+1)^4. - _Ralf Stephan_, Sep 03 2003
%K nonn
%O 2,2
%A _N. J. A. Sloane_.
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