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A105601
as a simple table
n
a(n)
0
0
1
2
2
3
3
7
4
8
5
12
6
23
7
40
8
53
9
54
10
56
11
72
12
82
13
113
14
124
15
129
16
213
17
214
18
215
19
216
20
220
[0,2,3,7,8,12,23,40,53,54,56,72,82,113,124,129, 213,214,215,216,220]