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 A005124 #29 Feb 05 2024 00:55:17 %S A005124 0,1,2,5,7,8,10,13,16,17,20,22,26,28,31,35,38,41,43,47,52,55,58,61,62, %T A005124 65,68,70,71,73,77,80,82,85,86,92,98,101,103,107,110,113,118,121,127, %U A005124 131,136,140,145,146,148,157,160,161,163,178,181,182,185,187 %N A005124 Numbers k such that 8k + 3 is prime. %H A005124 Harvey P. Dale, <a href="/A005124/b005124.txt">Table of n, a(n) for n = 1..1000</a> %t A005124 (#-3)/8&/@Select[Range[3,1303,8],PrimeQ] (* _Harvey P. Dale_, May 19 2012 *) %t A005124 Select[Range[0, 300], PrimeQ[8 # + 3] &] (* _Vincenzo Librandi_, Jun 25 2014 *) %o A005124 (Magma) [n: n in [0..200] | IsPrime(8*n+3)]; // _Vincenzo Librandi_, Jun 25 2014 %o A005124 (PARI) is(n)=isprime(8*n+3) \\ _Charles R Greathouse IV_, Feb 17 2017 %K A005124 nonn %O A005124 1,3 %A A005124 _N. J. A. Sloane_ %E A005124 More terms from _Wesley Ivan Hurt_, Jun 25 2014