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A003207
as a simple table
n
a(n)
0
1
1
10
2
50
3
238
4
1114
5
4998
6
22562
7
98174
8
434894
9
1855346
10
8125390
11
34149330
[1,10,50,238,1114,4998,22562,98174,434894,1855346, 8125390,34149330]