Numbers n such that 5*10^n + 3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =8a(4) =18a(5) =20a(6) =31a(7) =42a(8) =103a(9) =175a(10) =181a(11) =531a(12) =706a(13) =1077a(14) =1177a(15) =1552a(16) =19737a(17) =32197a(18) =51508a(19) =58275a(20) =62233a(21) =90033