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 A138932 #2 Mar 31 2012 12:38:15
%S A138932 163,20101,7644886305906535603,23992928119718809985809180625983
%N A138932 Primes of the form (11^n - 3^n)/8.
%t A138932 a={}; Do[p=(11^n-3^n)/8; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 16^2}];a
%Y A138932 Cf. A128027.
%K A138932 nonn
%O A138932 1,1
%A A138932 _Vladimir Joseph Stephan Orlovsky_, May 16 2008