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A279214
as a simple table
n
a(n)
0
1
1
1
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
2
10
40
11
792
12
15374
13
281434
14
5089060
15
93082532
16
1743601076
17
33694028152
[1,1,0,0,0,0,0,0,0,2,40,792,15374,281434,5089060, 93082532,1743601076,33694028152]