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A163065 as a simple table

n a(n)
0 3
1 20
2 140
3 1000
4 7200
5 52000
6 376000
7 2720000
8 19680000
9 142400000
10 1030400000
11 7456000000
12 53952000000
13 390400000000
14 2824960000000
15 20441600000000
16 147916800000000
17 1070336000000000
18 7745024000000000
19 56043520000000000

[3,20,140,1000,7200,52000,376000,2720000,19680000,
 142400000,1030400000,7456000000,53952000000,
 390400000000,2824960000000,20441600000000,
 147916800000000,1070336000000000,7745024000000000,
 56043520000000000]

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Last modified December 10 00:12 EST 2023. Contains 367696 sequences. (Running on oeis4.)