A028821 - OEIS

A028821 as a simple table

n	a(n)
1	0
2	1
3	2
4	3
5	8
6	9
7	10
8	20
9	21
10	29
11	30
12	31
13	80
14	88
15	90
16	100
17	200
18	210
19	290
20	300
21	310
22	800
23	880
24	900
25	1000
26	2000
27	2100
28	2900
29	2979
30	3000
31	3100
32	3139
33	8000
34	8800
35	9000
36	10000
37	20000
38	21000
39	29000
40	29790
41	30000
42	31000
43	31390
44	31621
45	80000
46	88000

[0,1,2,3,8,9,10,20,21,29,30,31,80,88,90,100,200, 210,290,300,310,800,880,900,1000,2000,2100,2900, 2979,3000,3100,3139,8000,8800,9000,10000,20000, 21000,29000,29790,30000,31000,31390,31621,80000, 88000]