Let M(k) be the k X k matrix m_(i,j) = i (mod j) - j (mod i); then a(n) = det(M(2*n)).

A075691

Let M(k) be the k X k matrix m_(i,j) = i (mod j) - j (mod i); then a(n) = det(M(2*n)).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =81a(4) =81a(5) =53361a(6) =57744801a(7) =119836809

External references