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A096752
as a simple table
n
a(n)
0
1
1
1
2
3
3
10
4
45
5
216
6
1197
7
7134
8
46209
9
319555
10
2350183
11
18254380
12
149117618
13
1275857233
14
11396595255
[1,1,3,10,45,216,1197,7134,46209,319555,2350183, 18254380,149117618,1275857233,11396595255]