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 A062619 #23 Jul 04 2021 08:43:43 %S A062619 3,19,29,37,1879,3181,3331,19597,38993,84239,90679 %N A062619 Numbers k such that 53^k - 52^k is a prime. %C A062619 Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by _M. F. Hasler_, Sep 15 2013] %C A062619 All terms are prime. - _Robert Price_, Jan 20 2013 %C A062619 a(12) > 10^5. - _Robert Price_, Jan 20 2013 %C A062619 To elaborate on Robert Price's comment that all terms are prime: This is also true for all other sequences of numbers n such that k^n - (k-1)^n is prime. It is easy to prove by elementary means that if n = a * b, then k^n - (k-1)^n is divisible by k^(n-a) - (k-1)^(n-a) and k^(n-b) - (k-1)^(n-b). - _Alonso del Arte_, Sep 15 2013 %Y A062619 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062619 nonn,hard %O A062619 1,1 %A A062619 _Mike Oakes_, May 18 2001, May 19 2001 %E A062619 a(8)-a(11) from _Robert Price_, Jan 20 2013