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 A208573 #7 Sep 12 2015 13:36:29
%S A208573 11,17,29,59,101,197,419,809,1607,3119,6197,12377,24917,49169,98321,
%T A208573 196661,393299,786551,1572869,3145739,6292007,12582917,25166129,
%U A208573 50331707,100663427,201327011,402653411,805306457,1610613929,3221225549
%N A208573 Smallest twin prime > 3*2^n.
%e A208573 For n=1 the smallest twin prime > 3*2^n is 11.
%t A208573 stp[n_]:=Module[{t=NextPrime[3*2^n]},While[!PrimeQ[t+2],t=NextPrime[t]];t]; Array[stp, 30] (* _Harvey P. Dale_, Sep 12 2015 *)
%Y A208573 Cf. A001359, A208574.
%K A208573 nonn
%O A208573 1,1
%A A208573 _Washington Bomfim_, Feb 28 2012