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A013487 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 -560
5 50400
6 -4403520
7 451651200
8 -55603258880
9 8098495142400
10 -1364657183216640
11 258905686980864000
12 -53203592135631564800
13 11000355030582368256000
14 -1812425415209721012879360

[1,0,0,0,-560,50400,-4403520,451651200,
 -55603258880,8098495142400,-1364657183216640,
 258905686980864000,-53203592135631564800,
 11000355030582368256000,
 -1812425415209721012879360]

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Last modified October 18 08:19 EDT 2021. Contains 348066 sequences. (Running on oeis4.)