Numbers k such that 10^(2*k+1)-5*10^k-1 is prime.

A183185

Numbers k such that 10^(2*k+1)-5*10^k-1 is prime.

Terms

    a(0) =14a(1) =22a(2) =36a(3) =104a(4) =1136a(5) =17864a(6) =25448

External references