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 A031929 #12 May 19 2013 12:19:44 %S A031929 149,191,251,293,347,419,431,557,587,641,701,719,797,821,839,929,1031, %T A031929 1049,1061,1163,1181,1259,1409,1481,1637,1709,1733,1811,1889,2027, %U A031929 2039,2063,2099,2153,2531,2657,2729,2741,2777,2897,2927,3011 %N A031929 Upper prime of a difference of 10 between consecutive primes. %H A031929 <a href="/index/Pri#gaps">Index entries for primes, gaps between</a> %K A031929 nonn %O A031929 0,1 %A A031929 _Jeff Burch_ %E A031929 Corrected by _Jud McCranie_, Jan 04 2001