820125domain: NAppears in sequencesDiscriminants of totally real sextic fields.at n=9A023686Numbers of form 5^i*9^j, with i, j >= 0.at n=34A025624Numbers of the form i^j * j^k * k^i, where i,j,k > 1.at n=19A259406Odd exceptional numbers: odd k such that A005179(k) < A037019(k).at n=34A331613