-184320

Appears in sequences

• Determinant of the n X n matrix M_(i,j)=i/gcd(i,j)=lcm(i,j)/j.at n=12A085542
• Triangle T(n, k) = H(n, k+1) - 2*H(n, k) - H(n, k-1), where H(n, k) = A060821(n+3, k), read by rows.at n=27A140873
• A triangle related to the GF(z) formulas of the rows of the ED2 array A167560.at n=32A167568
• G.f.: ( Sum_{n>=0} 8^n*x^(n^2) )^(1/2).at n=8A227295
• Determinant of the circulant matrix whose first column corresponds to the divisors of n.at n=20A306598