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 A142020 #12 Sep 08 2022 08:45:35 %S A142020 47,109,233,419,853,977,1039,1163,1597,1721,1783,1907,2341,2713,2837, %T A142020 3023,3209,3271,3457,3581,3643,3767,4139,4201,4759,5441,5503,5689, %U A142020 5813,6247,6619,6991,7177,7487,7549,7673,8231,8293,9161,9533,9719,9781,9967,10091 %N A142020 Primes congruent to 16 mod 31. %H A142020 Vincenzo Librandi, <a href="/A142020/b142020.txt">Table of n, a(n) for n = 1..1000</a> %F A142020 a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 03 2016 %t A142020 Select[Range[16,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 30 2011 *) %o A142020 (Magma) [p: p in PrimesUpTo(12000) | p mod 31 eq 16 ]; // _Vincenzo Librandi_, Aug 17 2012 %o A142020 (PARI) is(n)=isprime(n) && n%31==16 \\ _Charles R Greathouse IV_, Jul 03 2016 %Y A142020 Cf. A000040, A142005, A142006, A142019. %K A142020 nonn,easy %O A142020 1,1 %A A142020 _N. J. A. Sloane_, Jul 11 2008