Number of numbers below 10^n with nonzero multiplicative digital root 1 (not counting 0).
A051821
Number of numbers below 10^n with nonzero multiplicative digital root 1 (not counting 0).
Terms
- a(0) =1a(1) =6a(2) =30a(3) =273a(4) =3321a(5) =38545a(6) =413435a(7) =4179623a(8) =40717550a(9) =389610397a(10) =3704647927a(11) =35103992478a(12) =330893886987
External references
- oeis: A051821