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 A142049 #11 Sep 08 2022 08:45:35
%S A142049 67,199,331,397,463,661,727,859,991,1123,1321,1453,1783,2113,2179,
%T A142049 2311,2377,2707,2971,3037,3169,3301,3433,3499,3631,3697,4027,4093,
%U A142049 4159,4357,4423,4621,4951,5281,5347,5413,5479,5743,6007,6073,6271,6337,6469,6733
%N A142049 Primes congruent to 1 mod 33.
%H A142049 Vincenzo Librandi, <a href="/A142049/b142049.txt">Table of n, a(n) for n = 1..1000</a>
%F A142049 a(n) ~ 20n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t A142049 Select[Prime[Range[3000]],MemberQ[{1},Mod[#,33]]&] (* _Vincenzo Librandi_, Aug 18 2012 *)
%t A142049 Select[Range[1,6800,33],PrimeQ] (* _Harvey P. Dale_, May 07 2022 *)
%o A142049 (Magma) [p: p in PrimesUpTo(7000) | p mod 33 eq 1 ]; // _Vincenzo Librandi_, Aug 18 2012
%o A142049 (PARI) is(n)=isprime(n) && n%33==1 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y A142049 Cf. A000040.
%K A142049 nonn,easy
%O A142049 1,1
%A A142049 _N. J. A. Sloane_, Jul 11 2008