546750000domain: NAppears in sequencesa(1) = 1, and for n > 1, a(n) = A276086(n) * a(A064989(n)).at n=25A324889Even positive integers whose canonical prime factorization p_1^e_1*...*p_r^e_r satisfies that {p_1, ..., p_r, e_1, ..., e_r} is a set of 2*r consecutive integers.at n=29A392046