524688domain: NAppears in sequencesa(n) = Sum_{k divides n} (n/k)^k.at n=37A055225a(n) = Sum_{d|n} rad(d)^(n/d), where rad(d) = A007947(d) is the squarefree kernel of d.at n=37A095001a(n) = n^2 + 2^(n-1).at n=19A362438a(n) is the number of subsets x of Z_n such that #x * #y = n and x + y = Z_n for some subset y of Z_n.at n=37A374770