a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks at least one of the digits 1,2 and at least one of the digits 3,4,5,6,7,8,9.
A125880
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks at least one of the digits 1,2 and at least one of the digits 3,4,5,6,7,8,9.
Terms
- a(0) =10a(1) =98a(2) =946a(3) =9026a(4) =85330a(5) =800738a(6) =7463746a(7) =69054146a(8) =633214450a(9) =5746812578a(10) =51574432546a(11) =457575310466
External references
- oeis: A125880