Number of numbers below 10^n with nonzero multiplicative digital root 9.
A051829
Number of numbers below 10^n with nonzero multiplicative digital root 9.
Terms
- a(0) =1a(1) =5a(2) =30a(3) =210a(4) =1850a(5) =19528a(6) =233289a(7) =2805652a(8) =31522803a(9) =326897695a(10) =3190607915a(11) =30250443755a(12) =287335303424
External references
- oeis: A051829