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A164972 as a simple table

n a(n)
0 1
1 0
2 0
3 6720
4 98280
5 5370624
6 19138560
7 425761920
8 805208040
9 11171166720
10 14651449344
11 151720309440
12 156717687840
13 1331073596160
14 1162883174400
15 8553148603776
16 6596666916840
17 43528633182720
18 30507984568320

[1,0,0,6720,98280,5370624,19138560,425761920,
 805208040,11171166720,14651449344,151720309440,
 156717687840,1331073596160,1162883174400,
 8553148603776,6596666916840,43528633182720,
 30507984568320]

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Last modified July 20 16:15 EDT 2019. Contains 325185 sequences. (Running on oeis4.)