Smallest prime factor that the repunit(n) = (10^n-1)/9 shares with at least one other binary vector of the same length in base 10, or 1 if they are coprime.
A385579
Smallest prime factor that the repunit(n) = (10^n-1)/9 shares with at least one other binary vector of the same length in base 10, or 1 if they are coprime.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =11a(5) =1a(6) =3a(7) =1a(8) =11a(9) =3a(10) =11a(11) =1a(12) =3a(13) =53a(14) =11a(15) =3a(16) =11a(17) =1a(18) =3a(19) =1a(20) =11a(21) =3a(22) =11a(23) =1a(24) =3a(25) =41a(26) =11a(27) =3a(28) =11a(29) =3191
External references
- oeis: A385579