236377domain: NPropertiesPrimalityPrimeyesAppears in sequencesGreatest prime factor of n^9+1.at n=18A240552a(n) is the largest prime factor of n^n - n.at n=17A372229a(n) = Sum_{j=1..n} Sum_{k=1..n} phi(j*k).at n=37A372633Prime numbersat n=20932