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 A062629 #16 Jul 04 2021 08:51:09 %S A062629 3,59,3499,3571 %N A062629 Numbers k such that 63^k - 62^k is prime. %C A062629 Terms greater than 1000 are often only strong pseudoprimes. %C A062629 a(5) > 10^5. - _Robert Price_, Jun 05 2013 %o A062629 (PARI) is(n)=ispseudoprime(63^n-62^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062629 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062629 nonn,hard %O A062629 1,1 %A A062629 _Mike Oakes_, May 18 2001, May 19 2001