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A286424
as a simple table
n
a(n)
0
0
1
0
2
1
3
1
4
4
5
110
6
1432
7
23338
8
397661
9
8193828
10
212858328
11
5941706227
[0,0,1,1,4,110,1432,23338,397661,8193828, 212858328,5941706227]