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 A052257 #6 Oct 19 2017 03:13:51 %S A052257 11,11,13,17,11,7,7,19,11,7,17,23,13,19,7,13,13,7,7,19,11,7,23,7,23, %T A052257 13,11,13,7,43,19,29,7,19,7,11,7,7,47,11,37,31,11,7,13,53,7,37,47,7, %U A052257 43,17,7,41,19,31,17,11,61,43,17,67,13,31,17,11,29,71,73,37,7,13,11,7 %N A052257 Last filtering prime (A052180) of primes p such that next prime is p+10. %F A052257 A052180(A031928). %Y A052257 Cf. A031928, A052180. %K A052257 nonn %O A052257 1,1 %A A052257 _Labos Elemer_, Feb 02 2000 %E A052257 Corrected by _Don Reble_, May 07 2006