a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digit 1, at least one of the digits 2,3 and at least one of digits 4,5,6,7,8,9.
A125909
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digit 1, at least one of the digits 2,3 and at least one of digits 4,5,6,7,8,9.
Terms
- a(0) =9a(1) =79a(2) =681a(3) =5791a(4) =48729a(5) =405919a(6) =3340521a(7) =27094111a(8) =216288249a(9) =1699187359a(10) =13147825161a(11) =100334472031a(12) =756309350169
External references
- oeis: A125909