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A359688
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
4
6
10
7
36
8
94
9
294
10
794
11
2300
12
6394
13
18266
14
51592
15
147426
16
420512
17
1206740
18
3466876
[0,0,0,0,4,10,36,94,294,794,2300,6394,18266,51592, 147426,420512,1206740,3466876]