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A190340 as a simple table

n a(n)
1 4
2 12
3 72
4 720
5 10800
6 259200
7 10368000
8 673920000
9 70087680000
10 11774730240000
11 3214501355520000
12 1420809599139840000
13 1014458053785845760000
14 1171699052122651852800000
15 2191077227469358964736000000

[4,12,72,720,10800,259200,10368000,673920000,
 70087680000,11774730240000,3214501355520000,
 1420809599139840000,1014458053785845760000,
 1171699052122651852800000,
 2191077227469358964736000000]

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Last modified August 14 12:27 EDT 2020. Contains 336480 sequences. (Running on oeis4.)