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 A062625 #18 Jul 04 2021 09:00:38 %S A062625 3,7,1123,7489 %N A062625 Numbers k such that 59^k - 58^k is prime. %C A062625 Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by _M. F. Hasler_, Sep 15 2013] %C A062625 a(5) > 10^5. - _Robert Price_, Jan 31 2013 %o A062625 (PARI) is(n)=ispseudoprime(59^n-58^n) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A062625 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062625 nonn,hard %O A062625 1,1 %A A062625 _Mike Oakes_, May 18 2001, May 19 2001