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A108506
as a simple table
n
a(n)
1
2
2
3
3
4
4
8
5
20
6
38
7
95
8
248
9
263
10
303
11
304
12
410
13
438
14
548
15
688
16
1074
17
1575
18
8364
19
9910
20
15910
21
37344
[2,3,4,8,20,38,95,248,263,303,304,410,438,548,688, 1074,1575,8364,9910,15910,37344]