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A147356
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
3
7
9
8
20
9
53
10
182
11
863
12
4532
13
25697
14
176361
15
1505241
16
14929100
[1,1,1,1,1,3,9,20,53,182,863,4532,25697,176361, 1505241,14929100]