Number of nonzero palindromes less than 10^n.

Terms

a(0) =9a(1) =18a(2) =108a(3) =198a(4) =1098a(5) =1998a(6) =10998a(7) =19998a(8) =109998a(9) =199998a(10) =1099998a(11) =1999998a(12) =10999998a(13) =19999998a(14) =109999998a(15) =199999998a(16) =1099999998a(17) =1999999998a(18) =10999999998a(19) =19999999998a(20) =109999999998a(21) =199999999998