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 A115984 #2 Mar 30 2012 17:40:36 %S A115984 4,5,6,9,12,15,17,18,21,22,23,26,29,30,31,34,37,38,39,42,43,45,46,47, %T A115984 49,50,51,52,53,55,56,60,64,68,69,70,71,72,76,77,78,79,81,82,86,87,89, %U A115984 91,92,93,95,96,97,99,100,101,102,105,106,107,108,110,111,112,113,114 %N A115984 Positive n which are the average of a run of at least 2 consecutive primes. %e A115984 4=(3+5)/2. %Y A115984 Cf. A060863, A115985. %K A115984 nonn %O A115984 1,1 %A A115984 _Giovanni Resta_, Feb 10 2006