This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A241427 #24 Aug 11 2014 23:38:27 %S A241427 7,2,3,6102977801,5,79792265017612001,7,2486784401 %N A241427 Smallest prime of the form n^k - k^n for some k, or 0 if no such prime exists. %C A241427 Conjecture: a(n) > 0 for all n not in A097764. %C A241427 More terms in b-file. If n > 4 and in A097764, n^k - k^n is factorable and won't be prime. %C A241427 a(17) > 17^7500 - 7500^17. See A239279. %H A241427 Derek Orr, <a href="/A241427/b241427.txt">Table of n, a(n) for n = 2..16</a> %o A241427 (PARI) %o A241427 a(n)=k=1;if(n>4,forprime(p=1,100,if(ispower(n)&&ispower(n)%p==0&&n%p==0,return(0));if(n%p==n,break)));k=1;while(!ispseudoprime(n^k-k^n),k++);return(n^k-k^n) %o A241427 vector(15, n, a(n+1)) %Y A241427 Cf. A078201. %K A241427 nonn %O A241427 2,1 %A A241427 _Derek Orr_, Aug 08 2014