a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1,2,3 and at least one of digits 4,5,6,7,8,9.
A126627
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks digits 1,2,3 and at least one of digits 4,5,6,7,8,9.
Terms
- a(0) =7a(1) =49a(2) =343a(3) =2401a(4) =16807a(5) =116929a(6) =803383a(7) =5432161a(8) =36120007a(9) =236404609a(10) =1525601623a(11) =9726181921a(12) =61371928807a(13) =383929313089
External references
- oeis: A126627