A117073 - OEIS

A117073 as a simple table

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	9
8	10
9	11
10	20
11	21
12	22
13	40
14	41
15	42
16	82
17	83
18	84
19	166
20	167
21	168
22	334
23	335
24	336
25	670
26	671
27	672
28	1340
29	1341
30	1342
31	2682
32	2683
33	2684
34	5366
35	5367
36	5368
37	10734
38	10735
39	10736
40	21470
41	21471
42	21472
43	42942
44	42943
45	42944
46	85886
47	85887
48	85888

[0,1,2,3,4,5,6,9,10,11,20,21,22,40,41,42,82,83,84, 166,167,168,334,335,336,670,671,672,1340,1341, 1342,2682,2683,2684,5366,5367,5368,10734,10735, 10736,21470,21471,21472,42942,42943,42944,85886, 85887,85888]