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 A142007 #19 Sep 08 2022 08:45:35 %S A142007 3,127,251,313,499,809,1181,1367,1429,1553,1801,1987,2111,2297,2731, %T A142007 2917,3041,3413,3847,4157,4219,4591,5087,5273,5521,6079,6203,6389, %U A142007 6451,6637,6761,6823,6947,7691,7753,7877,8311,8807,9241,9551,9613,9923,10357,10667 %N A142007 Primes congruent to 3 mod 31. %H A142007 Vincenzo Librandi, <a href="/A142007/b142007.txt">Table of n, a(n) for n = 1..1000</a> %F A142007 a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 03 2016 %t A142007 Select[Range[3,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 07 2011 *) %o A142007 (Magma) [p: p in PrimesUpTo(11000) | p mod 31 eq 3]; // _Vincenzo Librandi_, Aug 06 2012 %o A142007 (PARI) is(n)=isprime(n) && n%31==3 \\ _Charles R Greathouse IV_, Jul 03 2016 %Y A142007 Cf. A142005, A142006. %K A142007 nonn,easy %O A142007 1,1 %A A142007 _N. J. A. Sloane_, Jul 11 2008