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A259938 as a simple table

n a(n)
0 0
1 1
2 0
3 0
4 -1
5 0
6 0
7 4
8 0
9 -1
10 -22
11 0
12 13
13 140
14 0
15 -136
16 -970
17 9
18 1330
19 7104
20 -231
21 -12650
22 -54096
23 3900
24 118780
25 423890
26 -54810
27 -1108380
28 -3393696
29 695640
30 10311840
31 27615648
32 -8282604
33 -95810606
34 -227480848
35 94449456
36 889817328
37 1890685212
38 -1044402840
39 -8263944216
40 -15811484852

[0,1,0,0,-1,0,0,4,0,-1,-22,0,13,140,0,-136,-970,9,
 1330,7104,-231,-12650,-54096,3900,118780,423890,
 -54810,-1108380,-3393696,695640,10311840,27615648,
 -8282604,-95810606,-227480848,94449456,889817328,
 1890685212,-1044402840,-8263944216,-15811484852]

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Last modified September 20 10:51 EDT 2021. Contains 347584 sequences. (Running on oeis4.)