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 A090834 #6 Dec 12 2015 12:55:00
%S A090834 251,5381,6311,12641,13451,14741,15791,17471,23321,26171,56081,62201,
%T A090834 75521,78791,82781,84431,89381,94421,95261,104711,115751,120551,
%U A090834 121001,154061,162251,163841,179801,185051,187361,191021,206021,214451,222311,226631,243521
%N A090834 Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.
%H A090834 Harvey P. Dale, <a href="/A090834/b090834.txt">Table of n, a(n) for n = 1..1000</a>
%e A090834 251,257,263,269 are consecutive primes,257=251+6,263=251+12,269=251+18 and 251=6*41+5
%t A090834 Transpose[Select[Partition[Prime[Range[30000]],4,1],Differences[#]=={6,6,6}&&IntegerQ[(#[[1]]-5)/6]&]][[1]] (* _Harvey P. Dale_, Dec 12 2015 *)
%Y A090834 Cf. A033451, A090832, A090833, A090835, A090836, A090837, A090838, A090839.
%K A090834 easy,nonn
%O A090834 1,1
%A A090834 _Pierre CAMI_, Dec 09 2003
%E A090834 More terms from _Harvey P. Dale_, Dec 12 2015