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 A052258 #9 May 30 2018 07:28:41 %S A052258 11,13,11,11,17,23,17,19,17,29,13,13,19,37,29,29,11,23,31,31,11,11,29, %T A052258 31,29,43,11,29,43,37,19,31,13,47,17,31,43,19,31,13,61,11,53,11,47,43, %U A052258 37,17,19,13,71,11,41,23,61,37,19,17,41,61,19,17,59,13,47,79,37,13,71 %N A052258 Last filtering prime (A052180) of primes p such that next prime is p+12. %Y A052258 Cf. A031930, A052180. %K A052258 nonn %O A052258 1,1 %A A052258 _Labos Elemer_, Feb 02 2000