365310domain: NAppears in sequencesa(n) = (n+1)(n+2)^3*(n+3)^2*(n+4)(n^2 + 4n + 5)/1440.at n=7A107967Numbers n of the form 4*k+2 such that (sigma(n) mod n) divides n, where sigma is given by A000203.at n=14A254999