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A218921
as a simple table
n
a(n)
0
1
1
1
2
3
3
9
4
44
5
101
6
523
7
1195
8
6751
9
16986
10
87884
11
248635
12
1709781
13
4665651
[1,1,3,9,44,101,523,1195,6751,16986,87884,248635, 1709781,4665651]