183616domain: NAppears in sequencesa(n) = Sum_{1 <= x, y <= n} lcm(x, y).at n=30A064951Molien series for 16-dimensional group of structure Z_2^4.S_3 and order 96, corresponding to complete weight enumerators of Hermitian self-dual GF(4)-linear codes over GF(16) containing the all-ones vector.at n=12A092497