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A366507
as a simple table
n
a(n)
1
1
2
4147200
3
12743163
4
21147075
5
39143552
6
52921472
7
156754936
8
205889445
9
233935967
[1,4147200,12743163,21147075,39143552,52921472, 156754936,205889445,233935967]