Least prime p(k) such that k*p exceeds 10^n.

Terms

a(0) =2a(1) =5a(2) =17a(3) =59a(4) =223a(5) =757a(6) =2633a(7) =8969a(8) =30431a(9) =102191a(10) =341357a(11) =1134043a(12) =3749633a(13) =12351797a(14) =40558519a(15) =132820211a(16) =433927019a(17) =1414734187a(18) =4604123551a(19) =14959716349a(20) =48537631577a(21) =157280263711a(22) =509055969293