Prime factors of 10^100 - 1.

Terms

a(0) =3a(1) =3a(2) =11a(3) =41a(4) =101a(5) =251a(6) =271a(7) =3541a(8) =5051a(9) =9091a(10) =21401a(11) =25601a(12) =27961a(13) =60101a(14) =7019801a(15) =182521213001