79551domain: NAppears in sequencesa(n) = Sum_{d|n} sigma(n/d)*d^3.at n=42A027847Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.at n=10A148766a(n) = prime(n)^3 + prime(n) + 1.at n=13A181150