Numbers k such that (88*10^k - 1)/3 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =9a(5) =121a(6) =153a(7) =172a(8) =378a(9) =496a(10) =841a(11) =1594a(12) =1924a(13) =2692a(14) =4617a(15) =5148a(16) =12891a(17) =24259a(18) =24684a(19) =27690a(20) =68256a(21) =93760a(22) =104989