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 A142091 #13 Sep 08 2022 08:45:35
%S A142091 23,163,233,373,443,653,863,1213,1283,1423,1493,1913,2053,2333,2473,
%T A142091 2543,2683,2753,2963,3313,3593,3733,3803,3943,4013,4153,4363,4643,
%U A142091 4783,4993,5273,5413,5483,5623,5693,5903,6043,6113,6323,6673,6883,7583,7723,7793
%N A142091 Primes congruent to 23 mod 35.
%H A142091 Vincenzo Librandi, <a href="/A142091/b142091.txt">Table of n, a(n) for n = 1..1000</a>
%F A142091 a(n) ~ 24n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t A142091 Select[Range[23, 20000, 35], PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 29 2011 *)
%t A142091 Select[Prime[Range[3000]],MemberQ[{23},Mod[#,35]]&] (* _Vincenzo Librandi_, Aug 19 2012 *)
%o A142091 (Magma) [p: p in PrimesUpTo(9000) | p mod 35 eq 23 ]; // _Vincenzo Librandi_, Aug 19 2012
%o A142091 (PARI) is(n)=isprime(n) && n%35==23 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y A142091 Cf. A000040.
%K A142091 nonn,easy
%O A142091 1,1
%A A142091 _N. J. A. Sloane_, Jul 11 2008