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A369365
as a simple table
n
a(n)
1
1
2
1
3
2
4
6
5
16
6
50
7
150
8
458
9
1388
10
4233
11
12875
12
39227
13
119456
14
363868
15
1107912
16
3372793
17
10264156
18
31228969
[1,1,2,6,16,50,150,458,1388,4233,12875,39227, 119456,363868,1107912,3372793,10264156,31228969]