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A295400
as a simple table
n
a(n)
1
1
2
2
3
5
4
8
5
14
6
18
7
20
8
36
9
68
10
224
11
252
12
563
13
780
14
2430
15
3150
16
7919
17
11092
18
14020
19
14908
20
58032
[1,2,5,8,14,18,20,36,68,224,252,563,780,2430,3150, 7919,11092,14020,14908,58032]