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 A286678 #28 Feb 18 2024 09:07:21 %S A286678 5,17,257,65537,795866110996400884391941, %T A286678 3402823669209384634633746074317682114560000000000000000000000000000000000000000000000000000000000000039 %N A286678 Smallest prime of the form (1 + k)^(2^n) + k. %Y A286678 Cf. A285929, A286982, A287842. %K A286678 nonn,less %O A286678 1,1 %A A286678 _Juri-Stepan Gerasimov_, May 12 2017