Palindromic and divisible by 9.

Terms

a(0) =0a(1) =9a(2) =99a(3) =171a(4) =252a(5) =333a(6) =414a(7) =585a(8) =666a(9) =747a(10) =828a(11) =909a(12) =999a(13) =1881a(14) =2772a(15) =3663a(16) =4554a(17) =5445a(18) =6336a(19) =7227a(20) =8118a(21) =9009a(22) =9999a(23) =10701a(24) =11511a(25) =12321a(26) =13131a(27) =14841a(28) =15651a(29) =16461