a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1 and 2, at least one of digits 3,4,5 and at least one of digits 6,7,8,9.
A126629
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1 and 2, at least one of digits 3,4,5 and at least one of digits 6,7,8,9.
Terms
- a(0) =8a(1) =64a(2) =506a(3) =3916a(4) =29498a(5) =215524a(6) =1527506a(7) =10528876a(8) =70841738a(9) =467044084a(10) =3027621506a(11) =19356463036a(12) =122355512378a(13) =766290978244
External references
- oeis: A126629