Numbers k such that (11*10^k - 131)/3 is prime.

Terms

a(0) =3a(1) =9a(2) =10a(3) =28a(4) =41a(5) =58a(6) =62a(7) =86a(8) =192a(9) =209a(10) =566a(11) =1227a(12) =1566a(13) =1995a(14) =2003a(15) =3654a(16) =4271a(17) =6107a(18) =6281a(19) =8997a(20) =24412a(21) =32970a(22) =65944a(23) =85782a(24) =112742a(25) =115910a(26) =141718