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A254447
as a simple table
n
a(n)
0
0
1
2
2
13
3
31
4
45
5
200
6
854
7
3358
8
4698
9
29324
10
55295
11
263489
12
567993
13
2328803
[0,2,13,31,45,200,854,3358,4698,29324,55295, 263489,567993,2328803]