Product of the lowest and highest prime factors of n-th repunit A002275(n).
A249627
Product of the lowest and highest prime factors of n-th repunit A002275(n).
Terms
- a(0) =121a(1) =111a(2) =1111a(3) =11111a(4) =111a(5) =1111111a(6) =1507a(7) =1001001a(8) =100001a(9) =11111111111a(10) =29703a(11) =14064697609a(12) =10000001a(13) =8718483a(14) =64705883a(16) =1001001a(18) =307571a(19) =32516067a(20) =5645629
External references
- oeis: A249627