Numbers k such that (25*10^k - 67)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =39a(5) =63a(6) =64a(7) =82a(8) =129a(9) =441a(10) =685a(11) =947a(12) =1042a(13) =1063a(14) =1840a(15) =2311a(16) =8200a(17) =9641a(18) =15982a(19) =17643a(20) =45389a(21) =54443a(22) =100343a(23) =102076a(24) =124076