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 A050663 #5 Oct 14 2019 23:56:00 %S A050663 6983,46769,97039,97919,98519,99721,134129,283961,321187,373229, %T A050663 440497,444623,448519,472261,492839,504991,509557,553919,575009, %U A050663 578923,591937,605707,623107,629339,649559,687847,714037,744019,756011,791081,806671 %N A050663 Primes p such that number of primes produced according to rules stipulated in Honaker's A048853 is 1. %e A050663 Altering a(1)=6983 gives 1 prime: 6883. %Y A050663 Cf. A048853, A050673, A050652. %K A050663 nonn,base %O A050663 1,1 %A A050663 _Patrick De Geest_, Jul 15 1999