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 A142542 #11 Sep 08 2022 08:45:36
%S A142542 277,383,701,1019,1231,1549,1867,1973,2503,2609,2927,3457,3881,4093,
%T A142542 4517,4729,5153,5471,5683,6637,7591,8863,8969,9181,9817,9923,10453,
%U A142542 10559,10771,11831,12043,12149,13103,13421,13633,14057,15329,15541,15647,15859,17449
%N A142542 Primes congruent to 12 mod 53.
%H A142542 Vincenzo Librandi, <a href="/A142542/b142542.txt">Table of n, a(n) for n = 1..1000</a>
%F A142542 a(n) ~ 52n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A142542 Select[Prime[Range[2600]], MemberQ[{12}, Mod[#, 53]] &] (* _Vincenzo Librandi_, Aug 29 2012 *)
%t A142542 Select[Range[12,20000,53],PrimeQ] (* _Harvey P. Dale_, Dec 12 2013 *)
%o A142542 (Magma) [p: p in PrimesUpTo(20000) | p mod 53 eq 12]; // _Vincenzo Librandi_, Aug 29 2012
%o A142542 (PARI) is(n)=isprime(n) && n%53==12 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A142542 Cf. A000040.
%K A142542 nonn,easy
%O A142542 1,1
%A A142542 _N. J. A. Sloane_, Jul 11 2008