Numbers k such that (13*10^k - 37)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =8a(5) =26a(6) =64a(7) =116a(8) =123a(9) =157a(10) =178a(11) =288a(12) =328a(13) =1730a(14) =2712a(15) =3244a(16) =3865a(17) =7766a(18) =8792a(19) =9512a(20) =14917a(21) =33912a(22) =39058a(23) =57997a(24) =120306a(25) =150675a(26) =171306a(27) =173467a(28) =175965