386529domain: NAppears in sequencesa(n) = 5^n - n^4.at n=8A024053Monotonic ordering of nonnegative differences 5^i-4^j, for 40>= i>=0, j>=0.at n=40A192162Monotonic ordering of nonnegative differences 5^i-8^j, for 40>= i>=0, j>=0.at n=28A192197