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 A052158 #11 May 29 2018 00:50:28 %S A052158 31,61,73,151,157,271,331,367,373,433,541,571,601,607,727,733,751,991, %T A052158 1033,1063,1117,1123,1231,1291,1321,1453,1543,1621,1657,1741,1747, %U A052158 1753,1777,1861,1987,2011,2131,2281,2287,2341,2371,2383,2467,2551,2671,2677 %N A052158 Lower prime of a difference of 6 (G-minor-6 primes) between consecutive primes of 6k+1 form. %C A052158 The corresponding larger primes (G-major-6 primes) are also of the form 6k+1. %H A052158 Harvey P. Dale, <a href="/A052158/b052158.txt">Table of n, a(n) for n = 1..1000</a> %F A052158 A031924(n) == 1 (mod 6). %e A052158 a(1)=31 since a(1) + 6 = 37 is the next prime and 31 = 6*5 + 1. %t A052158 Transpose[Select[Partition[Prime[Range[400]],2,1],Last[#]-First[#] == 6 && Mod[First[#],6]==1&]][[1]] (* _Harvey P. Dale_, Oct 01 2013 *) %Y A052158 Cf. A031924, A031925. %K A052158 nonn %O A052158 1,1 %A A052158 _Labos Elemer_, Jan 25 2000