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 A142679 #11 Feb 13 2023 18:32:28
%S A142679 23,137,251,479,593,821,1049,1163,1277,1619,1733,1847,2417,2531,3329,
%T A142679 3557,3671,4013,4127,4241,4583,5039,5153,5381,6521,6863,6977,7433,
%U A142679 7547,8117,8231,8573,9029,9257,9371,9941,10169,10739,10853,11423,12107,12791,13931
%N A142679 Primes congruent to 23 mod 57.
%H A142679 Vincenzo Librandi, <a href="/A142679/b142679.txt">Table of n, a(n) for n = 1..1000</a>
%F A142679 a(n) ~ 36n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A142679 Select[Prime[Range[2400]], MemberQ[{23}, Mod[#, 57]] &] (* _Vincenzo Librandi_, Sep 02 2012 *)
%t A142679 Select[Range[23,14000,57],PrimeQ] (* _Harvey P. Dale_, Feb 13 2023 *)
%o A142679 (Magma) [p: p in PrimesUpTo(14000) | p mod 57 eq 23 ]; // _Vincenzo Librandi_, Sep 02 2012
%o A142679 (PARI) is(n)=isprime(n) && n%57==23 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A142679 Cf. A000040.
%K A142679 nonn,easy
%O A142679 1,1
%A A142679 _N. J. A. Sloane_, Jul 11 2008