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 A062589 #21 Jul 04 2021 07:53:00 %S A062589 229,241,673,5387,47581 %N A062589 Numbers k such that 23^k - 22^k is prime, or a strong pseudoprime. %C A062589 Terms greater than 1000 often correspond to "unproven" strong pseudoprimes. %C A062589 a(6) > 10^5. - _Robert Price_, Aug 22 2012 %Y A062589 Cf. A000043, A057468, A059801, A059802, A062572-A062588, A214658, A214655, A062592-A062666. %K A062589 nonn,hard %O A062589 1,1 %A A062589 _Mike Oakes_, May 18 2001, May 19 2001 %E A062589 a(5) from _Robert Price_, Aug 22 2012 %E A062589 Edited by _M. F. Hasler_, Sep 21 2013