a(n) = Product_{i=0..n, j=0..n, k=0..n} (i*j*k + 1).A306907a(n) = Product_{i=0..n, j=0..n, k=0..n} (i*j*k + 1).Terms a(0) =1a(1) =2a(2) =60750External referencesoeis: A306907