Numbers k such that (17*10^k - 179)/9 is prime.

Terms

a(0) =4a(1) =5a(2) =10a(3) =13a(4) =16a(5) =106a(6) =130a(7) =148a(8) =880a(9) =1261a(10) =2560a(11) =2629a(12) =3730a(13) =5284a(14) =7411a(15) =8255a(16) =9091a(17) =9490a(18) =10171a(19) =14033a(20) =25618a(21) =39382a(22) =47452