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A180119 as a simple table

n a(n)
0 0
1 1
2 6
3 36
4 240
5 1800
6 15120
7 141120
8 1451520
9 16329600
10 199584000
11 2634508800
12 37362124800
13 566658892800
14 9153720576000
15 156920924160000
16 2845499424768000
17 54420176498688000
18 1094805903679488000
19 23112569077678080000
20 510909421717094400000
21 11802007641664880640000

[0,1,6,36,240,1800,15120,141120,1451520,16329600,
 199584000,2634508800,37362124800,566658892800,
 9153720576000,156920924160000,2845499424768000,
 54420176498688000,1094805903679488000,
 23112569077678080000,510909421717094400000,
 11802007641664880640000]

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Last modified September 6 05:09 EDT 2024. Contains 375703 sequences. (Running on oeis4.)