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 A142902 #11 Sep 08 2022 08:45:37
%S A142902 23,149,401,653,1031,1283,1409,1787,1913,2039,2417,2543,3299,3677,
%T A142902 3803,3929,4937,5189,5441,5693,6197,6323,6449,6701,6827,7079,7331,
%U A142902 7457,7583,8087,8969,9221,9473,9851,10103,10607,10733,10859,11489,11867,12119,12497
%N A142902 Primes congruent to 23 mod 63.
%H A142902 Vincenzo Librandi, <a href="/A142902/b142902.txt">Table of n, a(n) for n = 1..1000</a>
%F A142902 a(n) ~ 36n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A142902 Select[Prime[Range[1900]], MemberQ[{23}, Mod[#, 63]] &] (* _Vincenzo Librandi_, Sep 06 2012 *)
%t A142902 Select[Range[23,13000,63],PrimeQ] (* _Harvey P. Dale_, Oct 28 2015 *)
%o A142902 (Magma) [p: p in PrimesUpTo(13000) | p mod 63 eq 23 ] ; // _Vincenzo Librandi_, Sep 05 2012
%o A142902 (PARI) is(n)=isprime(n) && n%63==23 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A142902 Cf. A000040.
%K A142902 nonn,easy
%O A142902 1,1
%A A142902 _N. J. A. Sloane_, Jul 11 2008