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 A128350 #12 Nov 01 2018 21:28:13
%S A128350 2,151,673,709,2999,17909,77213
%N A128350 Numbers k such that (14^k - 5^k)/9 is prime.
%C A128350 All terms are primes.
%C A128350 a(8) > 10^5. - _Robert Price_, Apr 23 2013
%t A128350 k=14; Do[p=Prime[n]; f=(k^p-5^p)/(k-5); If[ PrimeQ[f], Print[p] ], {n,1,200}]
%o A128350 (PARI) is(n)=isprime((14^n-5^n)/9) \\ _Charles R Greathouse IV_, Feb 17 2017
%Y A128350 Cf. A062572, A128344, A128345, A128346, A128347, A128348, A128349, A128351, A128352, A128353, A128354. Cf. A004061, A082182, A121877, A059802. Cf. A057171, A082387, A122853, A128335, A128336, A128337, A128338, A128339, A128340, A128341, A128342.
%K A128350 hard,more,nonn
%O A128350 1,1
%A A128350 _Alexander Adamchuk_, Feb 27 2007
%E A128350 One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), May 01 2008
%E A128350 a(6) and a(7) from _Robert Price_, Apr 23 2013