Numbers n such that 9*10^n-7 is prime.

Terms

a(0) =0a(1) =1a(2) =6a(3) =9a(4) =10a(5) =12a(6) =13a(7) =23a(8) =61a(9) =194a(10) =233a(11) =549a(12) =765a(13) =973a(14) =1061a(15) =1186a(16) =1853a(17) =3713a(18) =6789a(19) =7254a(20) =7765a(21) =9025a(22) =10855a(23) =23640a(24) =31440a(25) =31839a(26) =32287a(27) =120342a(28) =132148