4888643760domain: NAppears in sequencesa(n) = n*lcm{1,2,...,n}.at n=20A081528Earliest sequence such that xy | a(x+y) for all x>=1, y>=1.at n=20A169900Earliest sequence such that xy | a(x+y) and (x+y) | a(xy) for all x >= 1, y >= 1.at n=20A169902Maximum number of binary strings of length 2n obtained from a partition of n.at n=20A247651