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A241704
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
1
7
3
8
41
9
1095
10
104829
11
21981199
12
8077770931
[0,0,0,0,0,1,3,41,1095,104829,21981199,8077770931]