%I #17 Mar 27 2020 09:01:58

%S 1,3,8,16,23,38,51,71,73,108,141,156,166,178,198,233,271,288,346,376,

%T 451,453,471,478,646,656,773,778,786,871,926,1003,1013,1031,1156,1213,

%U 1311,1338,1543,1576,1618,1696,1751,1776,1793,1846,1856,1921,1933,1963

%N Numbers k such that 12*k+1, 12*k+5 and 12*k+7 are primes.

%H Amiram Eldar, <a href="/A123979/b123979.txt">Table of n, a(n) for n = 1..10000</a>

%p a:=proc(n) if isprime(12*n+1)=true and isprime(12*n+5)=true and isprime(12*n+7)=true then n else fi end: seq(a(n),n=1..2800); # _Emeric Deutsch_, Nov 06 2006

%t Select[Range[2000], And @@ PrimeQ /@ ({1, 5, 7} + 12#) &] (* _Ray Chandler_, Nov 05 2006 *)

%Y Cf. A110801.

%K nonn

%O 1,2

%A _Artur Jasinski_, Oct 30 2006

%E Extended by _Ray Chandler_, Nov 05 2006

%E More terms from _Emeric Deutsch_, Nov 06 2006