823201domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes with 39 as smallest positive primitive root.at n=9A061741a(n) = Sum_{1 <= x_1, x_2, x_3, x_4 <= n} ( n/gcd(x_1, x_2, x_3, x_4, n) )^3.at n=6A372964Prime numbersat n=65660