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A363203
as a simple table
n
a(n)
1
1
2
1
3
1
4
2
5
4
6
9
7
20
8
51
9
128
10
338
11
882
12
2350
13
6238
14
16693
15
44561
16
119339
17
319104
18
854420
19
2285357
[1,1,1,2,4,9,20,51,128,338,882,2350,6238,16693, 44561,119339,319104,854420,2285357]