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

A174177

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

Terms

    a(0) =1a(1) =5a(2) =11a(3) =14a(4) =19a(5) =55a(6) =101a(7) =560a(8) =805a(9) =3188a(10) =4441a(11) =25733a(12) =37501

External references