Moving the rightmost digit of a number to place it furthest to the left adds 9 to the number.

Terms

a(0) =12a(1) =23a(2) =34a(3) =45a(4) =56a(5) =67a(6) =78a(7) =89a(8) =101a(9) =212a(10) =323a(11) =434a(12) =545a(13) =656a(14) =767a(15) =878a(16) =989a(17) =1101a(18) =2212a(19) =3323a(20) =4434a(21) =5545a(22) =6656a(23) =7767a(24) =8878a(25) =9989a(26) =11101a(27) =22212a(28) =33323a(29) =44434