Numbers n such that 10^n + 2*n - 1 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =20a(5) =35a(6) =91a(7) =112a(8) =116a(9) =325a(10) =367a(11) =674a(12) =2440a(13) =14099a(14) =38315a(15) =47989