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A330876 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 9
5 108
6 2700
7 81000
8 14883750
9 347287500
10 9724050000
11 36756909000000
12 466996528845000000
13 6472571889791700000000
14 1082926002881049327000000000
15 13008107146607164515924000000000

[1,1,1,1,9,108,2700,81000,14883750,347287500,
 9724050000,36756909000000,466996528845000000,
 6472571889791700000000,
 1082926002881049327000000000,
 13008107146607164515924000000000]

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Last modified July 27 15:29 EDT 2021. Contains 346307 sequences. (Running on oeis4.)