OFFSET
1,1
LINKS
Jinyuan Wang, Table of n, a(n) for n = 1..100
MATHEMATICA
Select[Range[10^7], And @@ PrimeQ /@ ({2, 4, 6, 8, 10, 12}*# + 1) &] (* Ray Chandler, Nov 20 2006 *)
PROG
(PARI) is(k) = sum(j = 1, 6, isprime(2*j*k+1)) == 6; \\ Jinyuan Wang, Aug 04 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 31 2006
EXTENSIONS
Extended by Ray Chandler, Nov 20 2006
STATUS
approved