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 A142021 #12 Sep 08 2022 08:45:35 %S A142021 17,79,389,761,823,947,1009,1319,1381,1567,1753,1877,2063,2311,2621, %T A142021 2683,3613,3923,4357,4481,4729,5039,5101,5659,5783,6217,6899,6961, %U A142021 7333,7457,7643,7829,8263,8387,8573,8821,9007,9689,10061,10247,10433,10867,11177 %N A142021 Primes congruent to 17 mod 31. %H A142021 Vincenzo Librandi, <a href="/A142021/b142021.txt">Table of n, a(n) for n = 1..1000</a> %F A142021 a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 03 2016 %t A142021 Select[Range[17,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 30 2011 *) %o A142021 (Magma) [p: p in PrimesUpTo(12000) | p mod 31 eq 17 ]; // _Vincenzo Librandi_, Aug 17 2012 %o A142021 (PARI) is(n)=isprime(n) && n%31==17 \\ _Charles R Greathouse IV_, Jul 03 2016 %Y A142021 Cf. A000040, A142005, A142006, A142019. %K A142021 nonn,easy %O A142021 1,1 %A A142021 _N. J. A. Sloane_, Jul 11 2008