12109375domain: NAppears in sequencesNumbers k such that product of divisors of k ends with k and k is nonprime (A018252).at n=36A278473Expansion of phi_{5, 4}(x) where phi_{r, s}(x) = Sum_{n, m>0} m^r * n^s * x^{m*n}.at n=25A280022Hypotenuses for which there exist exactly 8 distinct integer triangles.at n=20A290499