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A109475 as a simple table

na(n)
01
10
20
324
415
524
6-288
7-360
8-688
96552
1012672
1128824
12-179760
13-489576
14-1302048
155217048
1619526032
1760278040
18-148068864
19-784538856
20-2808829296
213690331416
2231279327200
23130628742552
24-54844246832
25-1220948555112
26-6032746152576
27-1938148274280
2845890479702608

[1,0,0,24,15,24,-288,-360,-688,6552,12672,28824,
 -179760,-489576,-1302048,5217048,19526032,
 60278040,-148068864,-784538856,-2808829296,
 3690331416,31279327200,130628742552,-54844246832,
 -1220948555112,-6032746152576,-1938148274280,
 45890479702608]