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 A057563 #22 Jul 10 2017 22:59:56 %S A057563 1,2,49,114,126,295,357,1090,6152 %N A057563 Numbers k such that the k initial decimal digits of e - 2 form a prime number. %C A057563 a(10) > 300000 "or so" (according to S. Batalov, Jul 06 2017). - _Eric W. Weisstein_, Jun 10 2017 %H A057563 <a href="http://www.znz.freesurf.fr/pages/titanix.html">Titanix</a> [Broken link] %e A057563 Since e - 2 = 0.71828182845904..., the first terms are: %e A057563 k = 1 gives 7, which is prime. %e A057563 k = 2 gives 71, which is prime. %e A057563 k = 49 gives 7182818284590452353602874713526624977572470936999, which is prime. %K A057563 nonn,base,more %O A057563 1,2 %A A057563 _G. L. Honaker, Jr._, Oct 04 2000 %E A057563 a(8) proved prime by _Andrey V. Kulsha_ using Titanix. %E A057563 a(9) from _Serge Batalov_, Jun 21 2017