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A180392
as a simple table
n
a(n)
1
0
2
0
3
1
4
12
5
66
6
248
7
739
8
1880
9
4260
10
8832
11
17061
12
31108
13
54054
14
90168
15
145223
16
226864
[0,0,1,12,66,248,739,1880,4260,8832,17061,31108, 54054,90168,145223,226864]