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 A166241 #13 Sep 08 2022 08:45:48
%S A166241 3,83,292299923,684331371443,191640836307771341507,
%T A166241 9388970456309004899603,
%U A166241 30363584636685952989516426809065192841572196335875312999038527044324069339846978313376123672504677550327603
%N A166241 Primes of the form a(n) = 3^n + 5^n + 7^n.
%C A166241 The next term has 435 digits. - _Harvey P. Dale_, Apr 06 2015
%t A166241 Select[Table[3^n+5^n+7^n,{n,0,200}],PrimeQ] (* _Harvey P. Dale_, Apr 06 2015 *)
%o A166241 (Magma) [ a: n in [0..450]|IsPrime(a) where a is 3^n+5^n+7^n] // _Vincenzo Librandi_, Dec 08 2010
%Y A166241 Cf. A160773 (corresponding values of n).
%K A166241 nonn
%O A166241 1,1
%A A166241 _Zak Seidov_, Oct 09 2009