A117255 Column 0 of triangle A117254.

1, 1, -6, 224, -39424, 30277632, -98180268032, 1321338098679808, -73064711504598663168, 16493270769791857518968832, -15132641904367108441083979235328, 56258298143912014448000446346897129472, -845539117695226477286180063077230730209656832

Offset: 0

Author

Paul D. Hanna, Mar 14 2006

Keywords

• sign

Programs

PARI

{a(n)=local(m=1,p=4,q=4,r=1);prod(j=0,n-1,m*r-p*j)/n!*q^(n*(n-1)/2)}

Formula

a(n) = [prod_{j=0..n-1} (1-4*j)]/n! * 4^(n*(n-1)/2).