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A350739
as a simple table
n
a(n)
1
2
2
1
3
4
4
14
5
47
6
178
7
697
8
2746
9
11071
10
45093
11
185341
12
767786
13
3201291
14
13420045
15
56524684
[2,1,4,14,47,178,697,2746,11071,45093,185341, 767786,3201291,13420045,56524684]