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A194506 as a simple table

n a(n)
0 3
1 12
2 120
3 360
4 1008
5 20160
6 259200
7 907200
8 6652800
9 19160064
10 39626496000
11 62270208000
12 603542016000
13 640493568000
14 1067062284288000
15 4001483566080000
16 4174096582656000
17 162193467211776000
18 13651830701752320000
19 481714597618974720000

[3,12,120,360,1008,20160,259200,907200,6652800,
 19160064,39626496000,62270208000,603542016000,
 640493568000,1067062284288000,4001483566080000,
 4174096582656000,162193467211776000,
 13651830701752320000,481714597618974720000]

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Last modified July 14 15:42 EDT 2024. Contains 374322 sequences. (Running on oeis4.)