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Column 0 of triangle A117256.
1

%I #4 Mar 30 2012 18:36:56

%S 1,1,-10,750,-328125,779296875,-9741210937500,630569458007812500,

%T -209368765354156494140625,354400253854691982269287109375,

%U -3045627181563759222626686096191406250,132489108572997338342247530817985534667968750

%N Column 0 of triangle A117256.

%F a(n) = [prod_{j=0..n-1} (1-5*j)]/n! * 5^(n*(n-1)/2).

%o (PARI) {a(n)=local(m=1,p=5,q=5,r=1);prod(j=0,n-1,m*r-p*j)/n!*q^(n*(n-1)/2)}

%K sign

%O 0,3

%A _Paul D. Hanna_, Mar 14 2006