a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digits 1 and 2 and at least one of digits 3,4,5,6,7,8,9.
A125908
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digits 1 and 2 and at least one of digits 3,4,5,6,7,8,9.
Terms
- a(0) =8a(1) =64a(2) =512a(3) =4096a(4) =32768a(5) =262144a(6) =2092112a(7) =16595776a(8) =130437728a(9) =1013866624a(10) =7788438512a(11) =59145432256a(12) =444357721088
External references
- oeis: A125908