6102977801domain: NAppears in sequencesa(n) = 5^n - n^5.at n=14A024054Smallest prime of the form (n^k - k^n) for k > 1, or 1 if no such prime exists.at n=4A122735Primes of the form x^y - y^x, for x,y > 1.at n=9A123206Smallest prime of the form n^k - k^n for some k, or 0 if no such prime exists.at n=3A241427