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A069720 as a simple table

n a(n)
1 1
2 6
3 40
4 280
5 2016
6 14784
7 109824
8 823680
9 6223360
10 47297536
11 361181184
12 2769055744
13 21300428800
14 164317593600
15 1270722723840
16 9848101109760
17 76467608616960
18 594748067020800
19 4632774416793600
20 36135640450990080
21 282202144474398720
22 2206307674981662720
23 17266755717247795200

[1,6,40,280,2016,14784,109824,823680,6223360,
 47297536,361181184,2769055744,21300428800,
 164317593600,1270722723840,9848101109760,
 76467608616960,594748067020800,4632774416793600,
 36135640450990080,282202144474398720,
 2206307674981662720,17266755717247795200]

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Last modified April 19 16:08 EDT 2024. Contains 371794 sequences. (Running on oeis4.)