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 A062604 #23 Jul 04 2021 07:53:31 %S A062604 3,379,383,1373,1609,24611,38281 %N A062604 Numbers k such that 38^k - 37^k is prime. %C A062604 Terms greater than 1000 are often only strong pseudoprimes. %C A062604 a(8) > 10^5. - _Robert Price_, Sep 03 2012 %o A062604 (PARI) is(n)=ispseudoprime(38^n-37^n) \\ _Charles R Greathouse IV_, Jun 12 2017 %Y A062604 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062604 nonn,hard %O A062604 1,1 %A A062604 _Mike Oakes_, May 18 2001, May 19 2001 %E A062604 a(6) and a(7) from _Robert Price_, Sep 03 2012