123106domain: NAppears in sequencesa(n) = prime(1^3) + prime(2^3) + prime(3^3) + ... + prime(n^3).at n=14A109789a(n) = Sum_{1 <= x_1, x_2, x_3, x_4 <= n} sigma( ( n/gcd(x_1, x_2, x_3, x_4, n) )^4 ).at n=3A373135