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 A050664 #5 Oct 14 2019 23:55:47 %S A050664 4409,5077,6841,9199,17863,18637,30817,31477,35279,38557,39953,48527, %T A050664 55871,61441,62137,62459,66359,68023,68087,82997,83579,88951,89329, %U A050664 90437,94117,94343,96329,98981,99643,110753,111857,113453,117307 %N A050664 Primes p such that number of primes produced according to rules stipulated in Honaker's A048853 is 2. %e A050664 Altering a(1)=4409 gives 2 primes: 1409 and 4909. %Y A050664 Cf. A048853, A050673, A050653. %K A050664 nonn,base %O A050664 1,1 %A A050664 _Patrick De Geest_, Jul 15 1999