82920domain: NAppears in sequencesNumbers k such that k | sigma_11(k) - phi(k)^11.at n=19A055705144*n^2 - n.at n=23A156635a(n) = 576*n^2 - 2*n.at n=11A158371a(n) = 576*n^2 - 24.at n=11A158636