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A109480 as a simple table

n a(n)
0 1
1 0
2 0
3 2520
4 133443
5 4631480
6 77960400
7 -893357352
8 -129115605108
9 -5703597367944
10 -149338186169984
11 -972961974611592
12 136120392773772540
13 8711794854942581976
14 303065826438211841872
15 5303822147508364225592
16 -109717889804112201890124

[1,0,0,2520,133443,4631480,77960400,-893357352,
 -129115605108,-5703597367944,-149338186169984,
 -972961974611592,136120392773772540,
 8711794854942581976,303065826438211841872,
 5303822147508364225592,-109717889804112201890124]

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Last modified July 2 12:39 EDT 2022. Contains 355004 sequences. (Running on oeis4.)