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 A141974 #11 Sep 08 2022 08:45:35
%S A141974 23,79,107,163,191,331,359,443,499,751,863,919,947,1031,1087,1171,
%T A141974 1283,1367,1423,1451,1619,1759,1787,1871,2011,2039,2179,2207,2347,
%U A141974 2459,2543,2683,2711,2767,2851,2879,2963,3019,3187,3271,3299,3467,3607,3691,3719
%N A141974 Primes congruent to 23 mod 28.
%H A141974 Vincenzo Librandi, <a href="/A141974/b141974.txt">Table of n, a(n) for n = 1..1000</a>
%F A141974 a(n) ~ 12n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t A141974 Select[Prime[Range[1500]],MemberQ[{23},Mod[#,28]]&] (* _Vincenzo Librandi_, Aug 17 2012 *)
%t A141974 Select[Range[23,4000,28],PrimeQ] (* _Harvey P. Dale_, Nov 24 2017 *)
%o A141974 (Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 23 ]; // _Vincenzo Librandi_, Aug 17 2012
%o A141974 (PARI) is(n)=isprime(n) && n%28==23 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y A141974 Cf. A000040.
%K A141974 nonn,easy
%O A141974 1,1
%A A141974 _N. J. A. Sloane_, Jul 11 2008