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 A045409 #17 Dec 11 2023 10:49:53
%S A045409 3,5,11,17,19,31,47,53,59,61,67,73,89,101,103,109,131,137,151,157,173,
%T A045409 179,193,199,227,229,241,257,263,269,271,277,283,311,313,347,353,367,
%U A045409 383,389,397,409,431,439,467,479,487,509,521,523,557,563,571,577,593
%N A045409 Primes congruent to {3, 4, 5} mod 7.
%H A045409 Vincenzo Librandi, <a href="/A045409/b045409.txt">Table of n, a(n) for n = 1..1000</a>
%t A045409 Select[Prime[Range[200]],MemberQ[{3, 4, 5},Mod[#,7]]&] (* _Vincenzo Librandi_, Aug 12 2012 *)
%o A045409 (Magma) [ p: p in PrimesUpTo(600) | p mod 7 in {3..5} ]; // _Vincenzo Librandi_, Aug 12 2012
%Y A045409 Cf. A000040.
%K A045409 nonn,easy
%O A045409 1,1
%A A045409 _N. J. A. Sloane_