Numbers k such that 10*3^k + 1 is prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =7a(5) =9a(6) =12a(7) =18a(8) =22a(9) =102a(10) =112a(11) =157a(12) =162a(13) =289a(14) =619a(15) =763a(16) =1389a(17) =1783a(18) =1882a(19) =3294a(20) =3567a(21) =13297a(22) =14932a(23) =18954a(24) =19612a(25) =23598a(26) =33882a(27) =66874a(28) =70546a(29) =86568