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A355104 as a simple table

na(n)
01
12
28
336
4128
5-120
6-5904
78792
81015808
9-7346016
10-403678560
119772765552
12226781102016
13-17673167204576
1472041280334240
1538308664521315920
16-1705420687695700992
17-64315848872486436736
1811313330167773175073408
19-326450445457848188386944

[1,2,8,36,128,-120,-5904,8792,1015808,-7346016,
 -403678560,9772765552,226781102016,
 -17673167204576,72041280334240,38308664521315920,
 -1705420687695700992,-64315848872486436736,
 11313330167773175073408,-326450445457848188386944]