A167208 - OEIS

A167208

Append two digits, each increasing by one modulo 10 from the last digit of the positive integers. 0 -> 12 1 -> 123 2 -> 234 .. 9 -> 901 10 -> 1012.

12, 123, 234, 345, 456, 567, 678, 789, 890, 901, 1012, 1123, 1234, 1345, 1456, 1567, 1678, 1789, 1890, 1901, 2012, 2123, 2234, 2345, 2456, 2567, 2678, 2789, 2890, 2901, 3012, 3123, 3234, 3345, 3456, 3567, 3678, 3789, 3890, 3901, 4012, 4123