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A279452
as a simple table
n
a(n)
1
1
2
2
3
14
4
202
5
4361
6
126396
7
4444935
8
182567862
9
8560638040
10
451107721000
[1,2,14,202,4361,126396,4444935,182567862, 8560638040,451107721000]