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A024189 as a simple table

n a(n)
1 3
2 3
3 78
4 186
5 4008
6 15912
7 340560
8 1931760
9 43139520
10 321312960
11 7611891840
12 70589232000
13 1783264896000
14 19854108288000
15 535217663232000
16 6967948748544000
17 200181525175296000
18 2987361024592896000
19 91267413626898432000
20 1537150149529860096000
21 49817611958159130624000

[3,3,78,186,4008,15912,340560,1931760,43139520,
 321312960,7611891840,70589232000,1783264896000,
 19854108288000,535217663232000,6967948748544000,
 200181525175296000,2987361024592896000,
 91267413626898432000,1537150149529860096000,
 49817611958159130624000]

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)