A071161 - OEIS

A071161 as a simple table

n	a(n)
0	0
1	1
2	11
3	20
4	111
5	120
6	201
7	300
8	1111
9	1120
10	1201
11	1300
12	2011
13	2020
14	3001
15	4000
16	11111
17	11120
18	11201
19	11300
20	12011
21	12020
22	13001
23	14000
24	20111
25	20120
26	20201
27	20300
28	30011
29	30020
30	40001
31	50000
32	111111
33	111120
34	111201
35	111300
36	112011

[0,1,11,20,111,120,201,300,1111,1120,1201,1300, 2011,2020,3001,4000,11111,11120,11201,11300,12011, 12020,13001,14000,20111,20120,20201,20300,30011, 30020,40001,50000,111111,111120,111201,111300, 112011]