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 A167056 #14 Aug 20 2025 17:28:26 %S A167056 0,1,2,3,5,6,8,10,11,12,13,16,17,18,22,23,25,27,30,31,36,38,40,41,43, %T A167056 45,47,50,51,52,53,57,60,61,62,65,67,68,71,73,75,76,80,82,86,87,88,90, %U A167056 93,97,102,106,107,108,110,116,118,120,121,122,123,127,128,130,131,135,138 %N A167056 Numbers k such that 12*k + 7 is prime. %C A167056 Corresponds to odd numbers in A024899. %H A167056 Vincenzo Librandi, <a href="/A167056/b167056.txt">Table of n, a(n) for n = 1..1000</a> %e A167056 2 is in the sequence since 12*2+7 = 31 is prime. %t A167056 Select[Range[0, 200], PrimeQ[12 # + 7] &] (* _Vincenzo Librandi_, May 20 2014 *) %o A167056 (PARI) isA167056(n) = isprime(12*n+7) %o A167056 (Magma) [n: n in [1..150] | IsPrime(12*n+7)]; // _Vincenzo Librandi_, May 20 2014 %Y A167056 A110801, A167055, A167057, A024899, primes are in A068229. %K A167056 easy,nonn %O A167056 1,3 %A A167056 _Michael B. Porter_, Oct 27 2009