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 A142190 #9 Sep 08 2022 08:45:35
%S A142190 19,59,139,179,379,419,499,619,659,739,859,1019,1259,1459,1499,1579,
%T A142190 1619,1699,1979,2099,2179,2339,2459,2539,2579,2659,2699,2819,2939,
%U A142190 3019,3259,3299,3499,3539,3659,3739,3779,4019,4099,4139,4219,4259,4339,5059,5099
%N A142190 Primes congruent to 19 mod 40.
%H A142190 Vincenzo Librandi, <a href="/A142190/b142190.txt">Table of n, a(n) for n = 1..1000</a>
%F A142190 a(n) ~ 16n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t A142190 Select[Prime[Range[2000]],MemberQ[{19},Mod[#,40]]&] (* _Vincenzo Librandi_, Aug 22 2012 *)
%o A142190 (Magma) [p: p in PrimesUpTo(6000) | p mod 40 eq 19 ]; // _Vincenzo Librandi_, Aug 22 2012
%o A142190 (PARI) is(n)=isprime(n) && n%40==19 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y A142190 Cf. A000040.
%K A142190 nonn,easy
%O A142190 1,1
%A A142190 _N. J. A. Sloane_, Jul 11 2008