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A052584 as a simple table

n a(n)
0 2
1 2
2 6
3 30
4 216
5 2040
6 23760
7 327600
8 5201280
9 93260160
10 1861574400
11 40914720000
12 981474278400
13 25512104217600
14 714251739801600
15 21426244519680000
16 685618901839872000
17 23310686975127552000
18 839178328730886144000
19 31888654846673264640000
20 1275543760964922408960000

[2,2,6,30,216,2040,23760,327600,5201280,93260160,
 1861574400,40914720000,981474278400,
 25512104217600,714251739801600,21426244519680000,
 685618901839872000,23310686975127552000,
 839178328730886144000,31888654846673264640000,
 1275543760964922408960000]

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Last modified May 15 10:54 EDT 2021. Contains 343909 sequences. (Running on oeis4.)