Numbers n>0 such that 666*10^n+1 is prime.

Terms

a(0) =1a(1) =2a(2) =10a(3) =12a(4) =30a(5) =48a(6) =373a(7) =580a(8) =619a(9) =718a(10) =1592a(11) =2928a(12) =3076a(13) =4741a(14) =9198a(15) =14020