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 A142023 #12 Sep 08 2022 08:45:35 %S A142023 19,577,701,887,1259,1321,1693,1879,2003,2251,2437,3119,3181,3491, %T A142023 3677,3739,3863,4049,4111,4297,4421,4483,4793,5227,5351,5413,6343, %U A142023 6529,6653,7211,7459,7583,8017,8389,8513,8699,8761,9133,9257,9319,9629,10559,10993 %N A142023 Primes congruent to 19 mod 31. %H A142023 Vincenzo Librandi, <a href="/A142023/b142023.txt">Table of n, a(n) for n = 1..1000</a> %F A142023 a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 02 2016 %t A142023 Select[Range[19,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 30 2011 *) %o A142023 (Magma) [p: p in PrimesUpTo(12000) | p mod 31 eq 19 ]; // _Vincenzo Librandi_, Aug 27 2012 %o A142023 (PARI) is(n)=isprime(n) && n%31==19 \\ _Charles R Greathouse IV_, Jul 02 2016 %Y A142023 Cf. A000040, A142005, A142006, A142019. %K A142023 nonn,easy %O A142023 1,1 %A A142023 _N. J. A. Sloane_, Jul 11 2008