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A071007 as a simple table

n a(n)
0 0
1 0
2 0
3 2
4 8
5 40
6 200
7 980
8 5152
9 28448
10 162080
11 979000
12 6179360
13 40575392
14 279199648
15 1997406320
16 14825619200
17 114365751040
18 912510870272
19 7521873125408
20 64045101880960
21 561615674345600
22 5067769601121920
23 47023128008540992
24 447820056115824128

[0,0,0,2,8,40,200,980,5152,28448,162080,979000,
 6179360,40575392,279199648,1997406320,14825619200,
 114365751040,912510870272,7521873125408,
 64045101880960,561615674345600,5067769601121920,
 47023128008540992,447820056115824128]

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Last modified April 24 15:18 EDT 2024. Contains 371960 sequences. (Running on oeis4.)