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A223047
as a simple table
n
a(n)
1
45
2
536
3
24120
4
570915
5
28942155
6
932439860
7
46018580355
8
1721938403990
9
83979492229170
[45,536,24120,570915,28942155,932439860, 46018580355,1721938403990,83979492229170]