Map n = Sum c_i 10^i to a(n) = Sum c_i 9^i.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =9a(11) =10a(12) =11a(13) =12a(14) =13a(15) =14a(16) =15a(17) =16a(18) =17a(19) =18a(20) =18a(21) =19a(22) =20a(23) =21a(24) =22a(25) =23a(26) =24a(27) =25a(28) =26a(29) =27