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A056352 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 60
7 1080
8 11970
9 105840
10 821952
11 5874480
12 39713490
13 258136200
14 1631272140
15 10096734312
16 61536365730
17 370710950400
18 2213749552980
19 13132080672480
20 77509456122366
21 455754569691600

[0,0,0,0,0,60,1080,11970,105840,821952,5874480,
 39713490,258136200,1631272140,10096734312,
 61536365730,370710950400,2213749552980,
 13132080672480,77509456122366,455754569691600]

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Last modified August 9 22:24 EDT 2020. Contains 336326 sequences. (Running on oeis4.)