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A143890
as a simple table
n
a(n)
0
1
1
2
2
3
3
9
4
16
5
61
6
143
7
802
8
2265
9
17236
10
59156
11
631443
12
2686969
13
39237301
14
210001256
[1,2,3,9,16,61,143,802,2265,17236,59156,631443, 2686969,39237301,210001256]