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A284915 as a simple table

n a(n)
1 1
2 21175
3 123200
4 877800
5 2010624
6 3080000
7 6336000
8 8316000
9 0
10 4435200
11 8064000
12 3696000
13 0
14 0
15 2956800
16 0
17 0
18 0
19 0
20 4435200

[1,21175,123200,877800,2010624,3080000,6336000,
 8316000,0,4435200,8064000,3696000,0,0,2956800,0,0,
 0,0,4435200]

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Last modified June 4 02:25 EDT 2023. Contains 363118 sequences. (Running on oeis4.)