Numbers k such that (2*10^k - 41)/3 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =8a(5) =9a(6) =27a(7) =32a(8) =39a(9) =44a(10) =101a(11) =140a(12) =268a(13) =386a(14) =695a(15) =741a(16) =1155a(17) =1564a(18) =1611a(19) =4076a(20) =6083a(21) =11672a(22) =26685a(23) =50603a(24) =134720