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 A142374 #12 Sep 08 2022 08:45:36
%S A142374 23,211,587,1151,1433,1621,1997,2467,2749,2843,3313,3407,3877,4159,
%T A142374 4253,4441,4723,4817,5099,5381,5569,5851,6133,6791,7919,8389,10457,
%U A142374 10739,11491,11867,12149,12619,12713,13183,13841,14029,14593,14969,15439,16097,16567
%N A142374 Primes congruent to 23 mod 47.
%H A142374 Vincenzo Librandi, <a href="/A142374/b142374.txt">Table of n, a(n) for n = 1..1000</a>
%F A142374 a(n) ~ 46n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A142374 Select[Prime[Range[2000]],Mod[#,47]==23&] (* _Harvey P. Dale_, Feb 05 2012 *)
%t A142374 Select[Prime[Range[2500]],MemberQ[{23},Mod[#,47]]&] (* _Vincenzo Librandi_, Aug 27 2012 *)
%o A142374 (Magma) [p: p in PrimesUpTo(18000) | p mod 47 eq 23]; // _Vincenzo Librandi_, Aug 27 2012
%o A142374 (PARI) is(n)=isprime(n) && n%47==23 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A142374 Cf. A000040.
%K A142374 nonn,easy
%O A142374 1,1
%A A142374 _N. J. A. Sloane_, Jul 11 2008