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 A177139 #8 Jun 21 2012 08:16:14
%S A177139 3,5,7,11,15,21,25,35,37,47,51,61,65,67,77,81,91,95,105,117,141,145,
%T A177139 155,175,191,201,207,215,221,271,275,277,287,295,341,345,351,355,365,
%U A177139 385,411,427,431,435,441,477,485,495,497
%N A177139 Numbers n such that (3*n-4, 3*n-2) is a twin prime pair.
%H A177139 Harvey P. Dale, <a href="/A177139/b177139.txt">Table of n, a(n) for n = 1..1000</a>
%F A177139 a(n) = (A001359(n+1)+4)/3 = 1+A014574(n+1)/3 = 1+A167379(n). [Eds., May 03 2010]
%t A177139 Flatten[Table[If[PrimeQ[3*n - 2] && PrimeQ[3*n - 4], n, {}], {n, 1, 500}]]
%t A177139 Select[Range[500],And@@PrimeQ[3#-{4,2}]&] (* _Harvey P. Dale_, Jun 21 2012 *)
%K A177139 nonn,less,easy
%O A177139 1,1
%A A177139 _Roger L. Bagula_, May 03 2010
%E A177139 Formula added by the Assoc. Eds. of the OEIS, May 03 2010.