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A319307 as a simple table

na(n)
01
1-32
2480
3-4480
429152
5-140736
6525952
7-1580800
83994080
9-8945824
1018626112
11-36714624
1267978880
13-118156480
14197120256
15-321692928
16509145568
17-772845120
181143441760
19-1681379200
202428524096
21-3392205824
224658843520
23-6411152640
248705492608
25-11488092896

[1,-32,480,-4480,29152,-140736,525952,-1580800,
 3994080,-8945824,18626112,-36714624,67978880,
 -118156480,197120256,-321692928,509145568,
 -772845120,1143441760,-1681379200,2428524096,
 -3392205824,4658843520,-6411152640,8705492608,
 -11488092896]