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A119611
as a simple table
n
a(n)
0
1
1
1
2
1
3
2
4
5
5
16
6
55
7
224
8
978
9
4507
10
21430
11
104423
12
517897
13
2606185
14
13272978
[1,1,1,2,5,16,55,224,978,4507,21430,104423,517897, 2606185,13272978]