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 A062665 #23 Jul 04 2021 09:13:53 %S A062665 2,709 %N A062665 Numbers k such that 99^k - 98^k is prime. %C A062665 a(3) > 20000. - _Derek Orr_, Sep 03 2014 %C A062665 Terms must be prime. - _Derek Orr_, Sep 03 2014 %C A062665 a(3) > 10^5. - _Robert Price_, Mar 22 2015 %o A062665 (PARI) is(n)=ispseudoprime(99^n-98^n) \\ _Charles R Greathouse IV_, Sep 04 2014 %Y A062665 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062665 nonn,hard,bref %O A062665 1,1 %A A062665 _Mike Oakes_, May 18 2001, May 19 2001