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A319897
as a simple table
n
a(n)
0
1
1
1
2
2
3
1
4
6
5
7
6
195
7
984
8
648947
9
35494648
10
689162614688
11
250087643676776
12
116889497942206867366
[1,1,2,1,6,7,195,984,648947,35494648,689162614688, 250087643676776,116889497942206867366]