Label a 1-cm ruler with digits 1 cm wide.

Terms

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