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

Terms

a(0) =0a(1) =1a(2) =4a(3) =24a(4) =43a(5) =94a(6) =193a(7) =204a(8) =379a(9) =405a(10) =675a(11) =3811a(12) =10239a(13) =26809