2517480

Appears in sequences

• Number of nonseparable toroidal tree-rooted maps with n + 2 edges and n + 1 vertices.at n=34A006414
• Number of equivalence classes of 3 X 3 matrices filled with n colors so that no two rotations are identical.at n=4A174686
• Lesser of exponentially-odd amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) is the sum of proper exponential-odd divisors of k.at n=30A325847