Numbers k such that (13*10^k - 61)/3 is prime.

Terms

a(0) =1a(1) =4a(2) =7a(3) =9a(4) =10a(5) =13a(6) =27a(7) =35a(8) =94a(9) =150a(10) =198a(11) =258a(12) =673a(13) =1194a(14) =1492a(15) =2320a(16) =2727a(17) =3767a(18) =6246a(19) =6877a(20) =14481a(21) =34327a(22) =57634a(23) =123137a(24) =190732