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A056779
as a simple table
n
a(n)
1
1
2
1
3
3
4
7
5
21
6
60
7
208
8
704
9
2542
10
9192
11
34053
12
126771
13
476849
14
1802367
15
6851960
16
26152629
[1,1,3,7,21,60,208,704,2542,9192,34053,126771, 476849,1802367,6851960,26152629]