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 digits 2,3,4 and at least one of digits 5,6,7,8,9.
A125910
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 digits 2,3,4 and at least one of digits 5,6,7,8,9.
Terms
- a(0) =9a(1) =81a(2) =723a(3) =6381a(4) =55539a(5) =475461a(6) =3993243a(7) =32857101a(8) =264890019a(9) =2094889941a(10) =16282118763a(11) =124625344221a(12) =941303216499
External references
- oeis: A125910