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 A142027 #14 Sep 05 2023 17:03:52 %S A142027 23,271,457,643,829,953,1201,1511,1697,1759,2069,2131,2441,2503,2689, %T A142027 2999,3061,3371,3433,3557,3929,4177,4363,4549,4673,5107,5231,5417, %U A142027 5479,5851,6037,6719,6781,6967,7649,8269,8641,8951,9013,9137,9199,9323,10067,10253 %N A142027 Primes congruent to 23 mod 31. %H A142027 Vincenzo Librandi, <a href="/A142027/b142027.txt">Table of n, a(n) for n = 1..1000</a> %F A142027 a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 02 2016 %t A142027 Select[Range[23,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 30 2011 *) %t A142027 Select[Prime[Range[1300]],Mod[#,31]==23&] (* _Harvey P. Dale_, Sep 05 2023 *) %o A142027 (Magma) [p: p in PrimesUpTo(12000) | p mod 31 eq 23 ]; // _Vincenzo Librandi_, Aug 17 2012 %o A142027 (PARI) is(n)=isprime(n) && n%31==23 \\ _Charles R Greathouse IV_, Jul 02 2016 %Y A142027 Cf. A000040, A142005, A142006, A142023. %K A142027 nonn,easy %O A142027 1,1 %A A142027 _N. J. A. Sloane_, Jul 11 2008