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A286303
as a simple table
n
a(n)
1
1
2
4
3
6
4
9
5
14
6
20
7
23
8
25
9
30
10
33
11
49
12
56
13
60
14
248
15
270
16
280
17
302
18
385
19
474
20
479
[1,4,6,9,14,20,23,25,30,33,49,56,60,248,270,280, 302,385,474,479]