431985domain: NAppears in sequencesa(n) = n^4 - (n-1)^4 + (n-2)^4 - ... 0^4.at n=30A062392Least odd number k such that Phi(k,x) is a flat cyclotomic polynomial of order n.at n=3A114735Numbers n such that Phi(n,x) is a flat cyclotomic polynomial of order four.at n=0A117318