Numbers k such that 7*k + 1 is prime.

Terms

a(0) =4a(1) =6a(2) =10a(3) =16a(4) =18a(5) =28a(6) =30a(7) =34a(8) =40a(9) =48a(10) =54a(11) =60a(12) =64a(13) =66a(14) =70a(15) =78a(16) =88a(17) =90a(18) =94a(19) =96a(20) =100a(21) =106a(22) =108a(23) =118a(24) =126a(25) =130a(26) =136a(27) =138a(28) =144a(29) =150