5764459domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = Sum_{1 <= x_1, x_2, x_3, x_4, x_5 <= n} ( n/gcd(x_1, x_2, x_3, x_4, x_5, n) )^3.at n=6A371491Prime numbersat n=397741