a(n) is the number of n-digit numbers divisible by their last digit.

A301803

a(n) is the number of n-digit numbers divisible by their last digit.

Terms

    a(0) =9a(1) =41a(2) =420a(3) =4203a(4) =42036a(5) =420357a(6) =4203572a(7) =42035714a(8) =420357143a(9) =4203571428a(10) =42035714286a(11) =420357142857

External references