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A288965 as a simple table

n a(n)
0 0
1 0
2 2
3 16
4 114
5 866
6 7188
7 65580
8 655872
9 7157376
10 84775680
11 1084343040
12 14906039040
13 219267751680
14 3437854963200
15 57247256424960
16 1009189972869120
17 18779054120386560
18 367876307230064640
19 7568437652936294400
20 163164173556503347200
21 3678547646214424166400

[0,0,2,16,114,866,7188,65580,655872,7157376,
 84775680,1084343040,14906039040,219267751680,
 3437854963200,57247256424960,1009189972869120,
 18779054120386560,367876307230064640,
 7568437652936294400,163164173556503347200,
 3678547646214424166400]

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Last modified April 17 14:32 EDT 2021. Contains 343063 sequences. (Running on oeis4.)