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 A062630 #17 Jul 04 2021 09:00:28 %S A062630 2,3,11,31,349,379,14669,19001,49957,68909 %N A062630 Numbers k such that 64^k - 63^k is prime. %C A062630 Terms greater than 1000 are often only strong pseudoprimes. %C A062630 a(11) > 10^5. - _Robert Price_, Jul 08 2013 %o A062630 (PARI) is(n)=ispseudoprime(64^n-63^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062630 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062630 nonn,hard %O A062630 1,1 %A A062630 _Mike Oakes_, May 18 2001, May 19 2001 %E A062630 a(7)-a(10) from _Robert Price_, Jul 08 2013