A167208 - OEIS

A167208 as a simple table

n	a(n)
0	12
1	123
2	234
3	345
4	456
5	567
6	678
7	789
8	890
9	901
10	1012
11	1123
12	1234
13	1345
14	1456
15	1567
16	1678
17	1789
18	1890
19	1901
20	2012
21	2123
22	2234
23	2345
24	2456
25	2567
26	2678
27	2789
28	2890
29	2901
30	3012
31	3123
32	3234
33	3345
34	3456
35	3567
36	3678
37	3789
38	3890
39	3901
40	4012
41	4123

[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]