Irregular triangle read by rows: row n lists the distinct prime factors of the generalized Fermat number F_n(10) = 10^(2^n) + 1.
A391444
Irregular triangle read by rows: row n lists the distinct prime factors of the generalized Fermat number F_n(10) = 10^(2^n) + 1.
Terms
- a(0) =11a(1) =101a(2) =73a(3) =137a(4) =17a(5) =5882353a(6) =353a(7) =449a(8) =641a(9) =1409a(10) =69857a(11) =19841a(12) =976193a(13) =6187457a(15) =1265011073a(18) =257a(19) =15361a(20) =453377
External references
- oeis: A391444