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A202747
as a simple table
n
a(n)
1
2
2
44
3
1074
4
29680
5
827502
6
27842760
7
967878370
8
35772388788
9
1349807335782
10
52493731492612
[2,44,1074,29680,827502,27842760,967878370, 35772388788,1349807335782,52493731492612]