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 A352046 #17 Sep 04 2024 15:15:44
%S A352046 2,7,107,6827,27962027,1789569707,114532461227,7870610804782742022827,
%T A352046 37167908664217705235892863787747269176634027,
%U A352046 9743344248872686121357898884775220131039550286507,623574031927851911766905528625614088386531218336427,46011642311937091916231705748513503016340726481135910367750161491995307
%N A352046 Primes of the form (5*4^k + 1)/3.
%C A352046 Primes in A136412.
%F A352046 { A000040 } intersect { A136412 }.
%e A352046 107 is a term because it is a prime and (5*4^3 + 1)/3 = 107.
%p A352046 select(isprime, [(5*4^k+1)/3$k=0..120])[]; # _Alois P. Heinz_, Mar 01 2022
%t A352046 Select[(5*4^Range[0,200]+1)/3,PrimeQ] (* _Harvey P. Dale_, Sep 04 2024 *)
%Y A352046 Cf. A000040, A136412.
%K A352046 nonn
%O A352046 1,1
%A A352046 _Patrick N. Valdivia_, Mar 01 2022