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A005545
as a simple table
n
a(n)
3
9
4
96
5
835
6
7020
7
58857
8
497360
9
4251804
10
36765592
11
321262541
12
2833702404
13
25204186455
14
225846648440
[9,96,835,7020,58857,497360,4251804,36765592, 321262541,2833702404,25204186455,225846648440]