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 A050660 #6 Oct 14 2019 23:56:27 %S A050660 117,121,123,129,131,137,143,163,167,193,199,201,213,243,263,267,283, %T A050660 287,333,343,347,407,431,437,447,451,471,477,481,483,497,501,543,553, %U A050660 591,603,609,633,641,667,681,687,693,697,731,737,747,753,757,759,783 %N A050660 Numbers n such that number of primes produced according to rules stipulated in Honaker's A048853 is 9. %e A050660 Altering a(1)=117 gives 9 primes: 317, 617, 107, 127, 137, 157, 167, 197 and 113. %Y A050660 Cf. A048853, A050662, A050671. %K A050660 nonn,base %O A050660 1,1 %A A050660 _Patrick De Geest_, Jul 15 1999