Irregular table read by rows: row n lists prime factors of 10^n + 1, with multiplicity.

Terms

a(0) =2a(1) =11a(2) =101a(3) =7a(4) =11a(5) =13a(6) =73a(7) =137a(8) =11a(9) =9091a(10) =101a(11) =9901a(12) =11a(13) =909091a(14) =17a(15) =5882353a(16) =7a(17) =11a(18) =13a(19) =19a(20) =52579a(21) =101a(22) =3541a(23) =27961a(24) =11a(25) =11a(26) =23a(27) =4093a(28) =8779a(29) =73