Numbers n such that 8*10^n-7 is prime.

Terms

a(0) =1a(1) =3a(2) =5a(3) =6a(4) =10a(5) =12a(6) =13a(7) =39a(8) =48a(9) =54a(10) =64a(11) =82a(12) =147a(13) =148a(14) =360a(15) =399a(16) =1638a(17) =1876a(18) =2146a(19) =2194a(20) =15789a(21) =23074a(22) =38466a(23) =68400