a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digit 1, at least one of digits 2,3, at least one of digits 4,5, at least one of digits 6,7 and at least one of digits 8,9.
A126641
a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digit 1, at least one of digits 2,3, at least one of digits 4,5, at least one of digits 6,7 and at least one of digits 8,9.
Terms
- a(0) =9a(1) =73a(2) =537a(3) =3625a(4) =22809a(5) =135913a(6) =777177a(7) =4308265a(8) =23329689a(9) =124104553a(10) =651267417a(11) =3382100905a(12) =17421964569a(13) =89180975593a(14) =454265623257
External references
- oeis: A126641