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A167593 as a simple table

n a(n)
3 9
4 120
5 952
6 5664
7 27888
8 120064
9 467712
10 1686528
11 5719296
12 18450432
13 57108480
14 170713088
15 495366144
16 1401028608
17 3874881536
18 10508304384
19 28005433344
20 73485778944
21 190154539008
22 485895438336
23 1227495571456 

[9,120,952,5664,27888,120064,467712,1686528,
 5719296,18450432,57108480,170713088,495366144,
 1401028608,3874881536,10508304384,28005433344,
 73485778944,190154539008,485895438336,
 1227495571456]

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Last modified May 16 13:05 EDT 2024. Contains 372552 sequences. (Running on oeis4.)