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 A224984 #11 Jul 29 2013 12:01:48 %S A224984 7,13,311,1637,4363,10433,41669,45631 %N A224984 Numbers n such that (14^n + 13^n)/27 is prime. %C A224984 All terms are prime. %C A224984 a(9) > 10^5. %t A224984 Select[ Prime[ Range[1, 100000] ], PrimeQ[ (14^# + 13^#)/27 ]& ] %o A224984 (PARI) forprime(p=3,10^6, if(ispseudoprime((14^p + 13^p)/27), print1(p,", ") ) ); \\ _Joerg Arndt_, Jul 29 2013 %Y A224984 Cf. A057180, A128072, A128343, A181141, A187819, A217095, A185239, A213216. %K A224984 hard,nonn,more %O A224984 1,1 %A A224984 _Robert Price_, Apr 22 2013 %E A224984 Removed incorrect first term of "2".