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A151986
as a simple table
n
a(n)
1
1
2
2
3
4
4
7
5
10
6
13
7
20
8
22
9
42
10
43
11
64
12
65
13
146
14
147
15
203
16
239
17
412
18
413
19
414
20
415
[1,2,4,7,10,13,20,22,42,43,64,65,146,147,203,239, 412,413,414,415]