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 A024906 #24 Sep 08 2022 08:44:48 %S A024906 2,4,8,12,14,18,20,22,30,34,42,44,48,54,58,60,64,68,70,82,84,90,92,98, %T A024906 102,104,110,112,118,124,128,130,142,144,158,162,170,172,174,180,184, %U A024906 188,194,198,200,208,222,224,228,232,238,240,242,250,252,254,260,264,274,278,280 %N A024906 Numbers k such that 9*k + 1 is prime. %H A024906 Vincenzo Librandi, <a href="/A024906/b024906.txt">Table of n, a(n) for n = 1..1000</a> %p A024906 select(k->isprime(9*k+1),[$1..370]); # _Muniru A Asiru_, Jul 15 2018 %t A024906 Select[Range[400],PrimeQ[9#+1]&] (* _Vladimir Joseph Stephan Orlovsky_, Feb 25 2011 *) %o A024906 (Magma) [n: n in [1..1000] |IsPrime(9*n+1)]; // _Vincenzo Librandi_, Nov 20 2010 %o A024906 (PARI) is(n)=isprime(9*n+1) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A024906 Cf. A061237 (associated primes). %K A024906 nonn,easy %O A024906 1,1 %A A024906 _Clark Kimberling_