a(n) = determinant(P*Q)/n! where P, Q are n X n matrices with P[i,j]=lcm(i,j), Q[i,j]=gcd(i,j).

A060239

a(n) = determinant(P*Q)/n! where P, Q are n X n matrices with P[i,j]=lcm(i,j), Q[i,j]=gcd(i,j).

Terms

    a(0) =1a(1) =-1a(2) =4a(3) =-8a(4) =128a(5) =512a(6) =-18432a(7) =73728a(8) =-884736a(9) =-14155776a(10) =1415577600a(11) =11324620800

External references