15207694336domain: NAppears in sequencesa(n) = q^9/6+5*q^8/6+2*q^7/3-q^6/6-5*q^5/6+q^4/3 where q = n-th prime power A000961(n).at n=10A229740a(n) = (n^9 + 5*n^8 + 4*n^7 - n^6 - 5*n^5 + 2*n^4)/6.at n=16A255501