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 A053702 #9 Oct 15 2013 22:30:48
%S A053702 9,27,81,125,6561,24389,59049,161051,357911,571787,1442897,4782969,
%T A053702 5177717,14348907,18191447,30080231,73560059,80062991,118370771,
%U A053702 127263527,131872229,318611987,344472101,440711081,461889917,590589719,756058031,865523177
%N A053702 Odd prime powers p^w (w>1) such that p^w+2 is prime.
%H A053702 Donovan Johnson, <a href="/A053702/b053702.txt">Table of n, a(n) for n = 1..1000</a>
%F A053702 A025475(n)+2 is prime
%e A053702 Examples: powers of 3 like 9,27,81,6561,59049; powers of 5 like 125; others like 23^3=24389, 71^3=357911, 83^3=571787, 11^5=161051, ...
%t A053702 Table[Do[s=2+Prime[w]^n; If[PrimeQ[s]&&!Greater[s, 10000000000], Print[s]], {n, 2, 35}], {w, 1, 1000}]
%Y A053702 Cf. A025475, A053704.
%K A053702 nonn
%O A053702 1,1
%A A053702 _Labos Elemer_, Feb 14 2000