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 A050667 #5 Oct 14 2019 23:55:08 %S A050667 29,31,37,59,61,67,89,269,331,443,487,503,521,569,571,599,733,751,761, %T A050667 773,811,919,983,1291,1303,1319,1511,1567,1777,1847,2179,2473,2579, %U A050667 2633,2671,2707,2927,3299,3449,3797,3847,3877,3943,3989,4139,4339,4561 %N A050667 Primes p such that number of primes produced according to rules stipulated in Honaker's A048853 is 5. %e A050667 Altering a(1)=29 gives 5 primes: 19, 59, 79, 89 and 23. %Y A050667 Cf. A048853, A050673, A050656. %K A050667 nonn,base %O A050667 1,1 %A A050667 _Patrick De Geest_, Jul 15 1999