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A009552 as a simple table

n a(n)
0 0
1 1
2 0
3 2
4 -12
5 71
6 -540
7 4780
8 -48328
9 549601
10 -6944040
11 96496894
12 -1462695300
13 24016678583
14 -424638675188
15 8043741624464
16 -162517240830480
17 3488577094105985
18 -79287238580689872
19 1902063885622909594

[0,1,0,2,-12,71,-540,4780,-48328,549601,-6944040,
 96496894,-1462695300,24016678583,-424638675188,
 8043741624464,-162517240830480,3488577094105985,
 -79287238580689872,1902063885622909594]

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Last modified February 25 20:04 EST 2020. Contains 332258 sequences. (Running on oeis4.)