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A212443 as a simple table

n a(n)
1 4
2 16
3 64
4 280
5 1344
6 6496
7 32640
8 166320
9 862400
10 4523232
11 23970240
12 128063040
13 689008320
14 3728973120
15 20285199872
16 110841302880
17 608029121280
18 3346972244000
19 18480871268160
20 102328688556864
21 568014587806720
22 3160148362953120
23 17617881702072960

[4,16,64,280,1344,6496,32640,166320,862400,
 4523232,23970240,128063040,689008320,3728973120,
 20285199872,110841302880,608029121280,
 3346972244000,18480871268160,102328688556864,
 568014587806720,3160148362953120,
 17617881702072960]

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Last modified June 1 04:51 EDT 2024. Contains 373010 sequences. (Running on oeis4.)