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 A132198 #18 Nov 18 2019 10:37:29
%S A132198 2,5,17,257,65537,4294967311,18446744073709551629,
%T A132198 340282366920938463463374607431768211507,
%U A132198 115792089237316195423570985008687907853269984665640564039457584007913129640233
%N A132198 a(n) is the least prime >= 2^(2^n).
%C A132198 The next term has 155 digits. - _Harvey P. Dale_, Aug 31 2016
%C A132198 For further terms, consult A097521 or A129786. - _Jeppe Stig Nielsen_, Nov 18 2019
%p A132198 2,seq(nextprime(2^(2^n)),n=1..8); # _Emeric Deutsch_, Nov 26 2007
%t A132198 Join[{2},NextPrime/@(2^(2^Range[8]))] (* _Harvey P. Dale_, Aug 31 2016 *)
%Y A132198 Cf. A019434, A097521, A129786.
%K A132198 nonn
%O A132198 0,1
%A A132198 _Leroy Quet_, Nov 05 2007
%E A132198 More terms from _Emeric Deutsch_, Nov 26 2007