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A118440 as a simple table

na(n)
01
10
24
30
448
5160
6-256
70
8-1792
9-7680
1016384
110
12135168
13532480
14-1048576
150
16-8323072
17-33423360
1867108864
190
20537919488
212149580800
22-4294967296
230
24-34342961152
25-137405399040
26274877906944
270
282199291691008
298796629893120
30-17592186044416
310
32-140733193388032
33-562941363486720

[1,0,4,0,48,160,-256,0,-1792,-7680,16384,0,135168,
 532480,-1048576,0,-8323072,-33423360,67108864,0,
 537919488,2149580800,-4294967296,0,-34342961152,
 -137405399040,274877906944,0,2199291691008,
 8796629893120,-17592186044416,0,-140733193388032,
 -562941363486720]