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 A141949 #18 Sep 08 2022 08:45:35
%S A141949 2,29,83,137,191,353,461,569,677,839,947,1109,1163,1217,1433,1487,
%T A141949 1811,1973,2027,2081,2243,2297,2351,2459,2621,2729,2837,2999,3323,
%U A141949 3539,3593,3701,3863,3917,4079,4133,4241,4349,4457,4673,4889,4943,5051,5483,5591
%N A141949 Primes congruent to 2 mod 27.
%H A141949 Vincenzo Librandi, <a href="/A141949/b141949.txt">Table of n, a(n) for n = 1..1000</a>
%F A141949 {2} UNION A142592. - _R. J. Mathar_, Jul 20 2008
%F A141949 a(n) ~ 18n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t A141949 Select[Prime[Range[900]],Mod[#,27]==2&] (* _Harvey P. Dale_, Apr 18 2011 *)
%o A141949 (Magma) [ p: p in PrimesUpTo(8000) | p mod 27 eq 2 ]; // _Vincenzo Librandi_, Apr 19 2011
%o A141949 (PARI) is(n)=isprime(n) && n%27==2 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y A141949 Cf. A000040.
%K A141949 nonn,easy
%O A141949 1,1
%A A141949 _N. J. A. Sloane_, Jul 11 2008