Numbers k such that (11*10^k - 113) / 3 is prime.

Terms

a(0) =4a(1) =6a(2) =13a(3) =15a(4) =23a(5) =25a(6) =31a(7) =71a(8) =133a(9) =333a(10) =341a(11) =905a(12) =1027a(13) =3667a(14) =7241a(15) =8217a(16) =8493a(17) =9816a(18) =11842a(19) =15454a(20) =15891a(21) =19117a(22) =30424a(23) =35196a(24) =42808a(25) =78408a(26) =95641a(27) =177466