Smallest prime factor of f(n) = 10^(2*n) + (10^n - 1)/9.

Terms

a(0) =101a(1) =3a(2) =7a(3) =7a(4) =3a(5) =317a(6) =40637a(7) =3a(8) =7a(9) =7a(10) =3a(11) =1487a(12) =101a(13) =3a(14) =7a(15) =7a(16) =3a(17) =39855301a(18) =641a(19) =3a(20) =7a(21) =7a(22) =3a(24) =101a(25) =3a(26) =7a(27) =7a(28) =3a(29) =121068683a(30) =47