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 A054801 #6 Oct 22 2013 10:57:36 %S A054801 257,1747,3307,5107,5387,6317,6367,12647,13457,14747,15797,15907, %T A054801 17477,18217,19477,23327,26177,30097,30637,53617,56087,62207,63697, %U A054801 71347,74471,75527,76561,77557,78797,80917,82787,83437,84437,89107,89387 %N A054801 Second term of balanced prime quartets: p(m)-p(m-1) = p(m+1)-p(m) = p(m+2)-p(m+1). %H A054801 Harvey P. Dale, <a href="/A054801/b054801.txt">Table of n, a(n) for n = 1..1000</a> %t A054801 Transpose[Select[Partition[Prime[Range[9000]],4,1],Length[ Union[ Differences[#]]] == 1&]][[2]] (* _Harvey P. Dale_, Oct 22 2013 *) %Y A054801 Cf. A006562, A054800-A054840. %K A054801 nonn %O A054801 1,1 %A A054801 _Henry Bottomley_, Apr 10 2000