cp's OEIS Frontend

A378623 Number of pairs (u,v) for which there is a set of n positive integers X = {x_1, ..., x_n} with u = |X+X| = #{x_i + x_j : 1 <= i,j <=n} and v = |X*X| = #{x_i * x_j : 1 <= i,j <=n}.