Numbers k such that 23*10^k - 7 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =8a(5) =12a(6) =18a(7) =19a(8) =30a(9) =65a(10) =77a(11) =126a(12) =353a(13) =541a(14) =576a(15) =723a(16) =777a(17) =1024a(18) =1194a(19) =1507a(20) =2379a(21) =2615a(22) =4008a(23) =4295a(24) =4495a(25) =4526a(26) =9996a(27) =10348a(28) =10673a(29) =14120