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 A062595 #17 Jul 04 2021 07:52:44 %S A062595 3,7219,34871 %N A062595 Numbers k such that 29^k - 28^k is prime. %C A062595 Terms > 1000 are often only strong pseudoprimes. %C A062595 a(4) > 10^5. - _Robert Price_, Sep 22 2012 %o A062595 (PARI) is(n)=ispseudoprime(29^n-28^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062595 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062595 nonn,hard,bref %O A062595 1,1 %A A062595 _Mike Oakes_, May 18 2001, May 19 2001 %E A062595 a(3) from _Robert Price_, Sep 22 2012