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 A301641 #20 Oct 06 2023 13:49:20
%S A301641 5,17,109,3294173,355271367880050092935562133789062501
%N A301641 Primes of form 4*k^k + 1.
%C A301641 No additional terms through k=1000. - _Harvey P. Dale_, Oct 06 2023
%F A301641 a(n) = 4*A301519(n+1)^A301519(n+1) + 1.
%p A301641 a:=k->`if`(isprime(4*k^k+1),4*k^k+1,NULL): seq(a(k),k=1..1400); # _Muniru A Asiru_, Mar 25 2018
%t A301641 Select[Table[4n^n+1,{n,30}],PrimeQ] (* _Harvey P. Dale_, Oct 06 2023 *)
%Y A301641 Primes of form b*k^k + 1: A121270 (b=1), A216148 (b=2), A301644 (b=3), this sequence (b=4), A301642 (b=16).
%Y A301641 Cf. A301519, A301808.
%K A301641 nonn
%O A301641 1,1
%A A301641 _Seiichi Manyama_, Mar 25 2018