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A323620 as a simple table

n a(n)
0 0
1 1
2 0
3 1
4 -4
5 19
6 -108
7 719
8 -5496
9 47465
10 -457160
11 4858865
12 -56490060
13 713165035
14 -9715762980
15 142069257055
16 -2219386098160
17 36889108220305
18 -650018185589520
19 12103669982341025
20 -237476572759473300
21 4896758300881695875
22 -105866710959427454300
23 2394660132226522508975

[0,1,0,1,-4,19,-108,719,-5496,47465,-457160,
 4858865,-56490060,713165035,-9715762980,
 142069257055,-2219386098160,36889108220305,
 -650018185589520,12103669982341025,
 -237476572759473300,4896758300881695875,
 -105866710959427454300,2394660132226522508975]

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Last modified August 14 18:55 EDT 2024. Contains 375166 sequences. (Running on oeis4.)