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A109573 as a simple table

n a(n)
0 0
1 1
2 2
3 0
4 -8
5 0
6 96
7 0
8 -2176
9 0
10 79360
11 0
12 -4245504
13 0
14 313155584
15 0
16 -30460116992
17 0
18 3777576173568
19 0
20 -581777702256640
21 0
22 108932957168730112
23 0
24 -24370173276164456448
25 0
26 6419958484945407574016
27 0
28 -1967044844910430876860416
29 0
30 693575525634287935244206080
31 0

[0,1,2,0,-8,0,96,0,-2176,0,79360,0,-4245504,0,
 313155584,0,-30460116992,0,3777576173568,0,
 -581777702256640,0,108932957168730112,0,
 -24370173276164456448,0,6419958484945407574016,0,
 -1967044844910430876860416,0,
 693575525634287935244206080,0]

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Last modified August 3 13:30 EDT 2021. Contains 346438 sequences. (Running on oeis4.)