a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digit 1 and at least one of digits 2,3,4,5,6,7,8,9.
A125630
a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digit 1 and at least one of digits 2,3,4,5,6,7,8,9.
Terms
- a(0) =9a(1) =81a(2) =729a(3) =6561a(4) =59049a(5) =531441a(6) =4782969a(7) =43006401a(8) =385606089a(9) =3440214801a(10) =30482931609a(11) =267934415841
External references
- oeis: A125630