Map n = Sum c_i 10^i to a(n) = Sum c_i 3^i.

Terms

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