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 A062581 #22 Jul 04 2021 08:43:07 %S A062581 2,3,43,173,193,7559,165559 %N A062581 Numbers k such that 15^k - 14^k is prime. %C A062581 Terms greater than 1000 may correspond to (unproven) strong pseudoprimes. [Clarified by _M. F. Hasler_, Sep 16 2013] %H A062581 Henri Lifchitz and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=15%5Ep-14%5Ep&action=Search">Top probable primes of the form 15^p-14^p</a> %o A062581 (PARI) is(n)=ispseudoprime(15^n-14^n) \\ _Charles R Greathouse IV_, Jun 12 2017 %Y A062581 Cf. A000043, A057468, A059801, A059802, A062572-A062666. %K A062581 nonn,hard %O A062581 1,1 %A A062581 _Mike Oakes_, May 18 2001, May 19 2001 %E A062581 a(7) from _Jean-Louis Charton_, Mar 28 2011