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 A157033 #10 Aug 01 2015 10:35:01
%S A157033 2,11,1009,10000019,1000000000000037,10000000000000000000000000000033,
%T A157033 1000000000000000000000000000000000000000000000000000000000000121
%N A157033 Smallest prime with 2^n digits.
%t A157033 f[n_] := NextPrime[10^(2^n - 1)]; Table[f@n, {n, 0, 7}] (* _Robert G. Wilson v_, Mar 17 2009 *)
%Y A157033 Cf. A157034, A003617, A157035, A157036.
%K A157033 nonn,base
%O A157033 0,1
%A A157033 _Lekraj Beedassy_, Feb 22 2009