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 A273804 #12 Sep 08 2022 08:46:17
%S A273804 317,557,65837,4294967597,
%T A273804 115792089237316195423570985008687907853269984665640564039457584007913129640237
%N A273804 Primes of the form 2^(2^n) + 301.
%C A273804 Terms given correspond to n = 2, 3, 4, 5 and 8.
%C A273804 Next term >= 2^2^23 + 301. - _Charles R Greathouse IV_, Jun 07 2016
%t A273804 Select[Table[2^(2^n) + 301, {n, 0, 16}], PrimeQ]
%o A273804 (Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+301];
%o A273804 (PARI) for(n=1,20, if(ispseudoprime(t=2^2^n+301), print1(t", "))) \\ _Charles R Greathouse IV_, Jun 07 2016
%Y A273804 Cf. similar sequences listed in A273547.
%K A273804 nonn
%O A273804 1,1
%A A273804 _Vincenzo Librandi_, Jun 02 2016