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 A105131 #8 Sep 08 2022 08:45:17
%S A105131 257,769,3329,7937,9473,14081,14593,22273,23297,26881,30977,31489,
%T A105131 36097,37633,40193,41729,43777,46337,49409,49921,57089,57601,60161,
%U A105131 70913,75521,77569,78593,84737,88321,91393,96001,98561,100609,103681,106753,107777
%N A105131 Primes of the form 512n+257.
%H A105131 Vincenzo Librandi, <a href="/A105131/b105131.txt">Table of n, a(n) for n = 1..1000</a>
%t A105131 Select[Table[512*n+257,{n,0,800}],PrimeQ] (* _Vincenzo Librandi_, Jul 19 2012 *)
%o A105131 (Magma) [ a: n in [0..210] | IsPrime(a) where a is 512*n+257 ]; // _Vincenzo Librandi_, Jul 19 2012
%Y A105131 Cf. A002145, A007521, A105126-A105132.
%K A105131 nonn,easy
%O A105131 1,1
%A A105131 _N. J. A. Sloane_, based on correspondence from _Marco Matosic_, Apr 11 2005