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 A081734 #6 Mar 30 2012 18:39:16 %S A081734 121174811,121174841,121174871,121174901,121174931,121174961 %N A081734 First and smallest sequence of 6 consecutive primes in arithmetic progression. %C A081734 Those 6 terms were first found by Lander and Parkin in 1967. %H A081734 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a> %Y A081734 Cf. A006560, A058362. %K A081734 fini,full,nonn %O A081734 1,1 %A A081734 _Benoit Cloitre_, Apr 06 2003