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 A141868 #9 Sep 08 2022 08:45:35
%S A141868 191,229,419,457,571,647,761,1103,1217,1483,1559,1597,1787,1901,2053,
%T A141868 2129,2243,2281,2357,2699,2851,2927,3041,3079,3307,3877,4219,4409,
%U A141868 4447,4523,4561,4637,4751,4789,4903,5701,6043,6271,6689,6803,6841,6917,7069,7297
%N A141868 Primes congruent to 1 mod 19.
%H A141868 Vincenzo Librandi, <a href="/A141868/b141868.txt">Table of n, a(n) for n = 1..1000</a>
%F A141868 a(n) ~ 18n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t A141868 Select[Prime[Range[2000]],MemberQ[{1},Mod[#,19]]&] (* _Vincenzo Librandi_, Aug 15 2012 *)
%o A141868 (Magma) [p: p in PrimesUpTo(8000) | p mod 19 eq 1 ]; // _Vincenzo Librandi_, Aug 15 2012
%o A141868 (PARI) is(n)=isprime(n) && n%19==1 \\ _Charles R Greathouse IV_, Jul 02 2016
%K A141868 nonn,easy
%O A141868 1,1
%A A141868 _N. J. A. Sloane_, Jul 11 2008