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 A273806 #7 Sep 08 2022 08:46:17
%S A273806 359,373,613,4294967653,
%T A273806 115792089237316195423570985008687907853269984665640564039457584007913129640293
%N A273806 Primes of the form 2^(2^n) + 357.
%C A273806 Terms given correspond to n = 0, 2, 3, 5 and 8.
%C A273806 Next term >= 2^2^24 + 357. - _Charles R Greathouse IV_, Jun 07 2016
%t A273806 Select[Table[2^(2^n) + 357, {n, 0, 15}], PrimeQ]
%o A273806 (Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+357];
%o A273806 (PARI) for(n=0,8, if(ispseudoprime(t=2^2^n+357), print1(t", "))) \\ _Charles R Greathouse IV_, Jun 07 2016
%Y A273806 Cf. similar sequences listed in A273547.
%K A273806 nonn
%O A273806 1,1
%A A273806 _Vincenzo Librandi_, Jun 02 2016