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A203200
as a simple table
n
a(n)
1
1
2
7
3
39
4
437
5
8925
6
305779
7
18569865
8
1972604754
9
365315073334
10
118431758924590
[1,7,39,437,8925,305779,18569865,1972604754, 365315073334,118431758924590]