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A056844
as a simple table
n
a(n)
1
1
2
2
3
9
4
40
5
238
6
1518
7
10276
8
71528
9
507725
10
3650323
11
26511768
[1,2,9,40,238,1518,10276,71528,507725,3650323, 26511768]
