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 A057664 #13 Feb 19 2018 17:26:40
%S A057664 11,37,618970019642690137449562201,
%T A057664 266998379490113760299377713271194014325338065294581596243380200977777465722580068752870260867389
%N A057664 Primes of the form p + 2^p where p is prime.
%C A057664 The next term has 212 digits. - _Harvey P. Dale_, Feb 19 2018
%t A057664 lst={};Do[p=Prime[n];If[PrimeQ[p=p+2^p],AppendTo[lst,p]],{n,5!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jan 28 2009 *)
%t A057664 Select[#+2^#&/@Prime[Range[100]],PrimeQ] (* _Harvey P. Dale_, Feb 19 2018 *)
%Y A057664 Cf. A057663, A057665.
%K A057664 nonn
%O A057664 1,1
%A A057664 _Labos Elemer_, Oct 16 2000