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Number of lines on the intersection of two general hypersurfaces of degree n in complex projective (n+2)-space.
0

%I #5 Feb 24 2006 03:00:00

%S 1,16,1053,111616,19188125,4782986496,1636365422153,735546407124992,

%T 420472391422517289,297915693945728000000,256254423319439013201029,

%U 263056604016582698937090048,317691429498449659489885141925

%N Number of lines on the intersection of two general hypersurfaces of degree n in complex projective (n+2)-space.

%F Coefficient of x^(n+2)*y^(n+1) in the polynomial (x-y)*product((k*x+(n-k)*y)^2, k=0..n)

%K nonn,easy

%O 1,2

%A Paolo Dominici (pl.dm(AT)libero.it)