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A024044 as a simple table

na(n)
01
13
2-240
3-6497
4-65280
5-389601
6-1675520
7-5748417
8-16711680
9-42784577
10-98951424
11-210164577
12-413204480
13-748621857
14-1207353600
15-1489148801
160
1710204111743
1857699516160
19257894343903
201073911627776

[1,3,-240,-6497,-65280,-389601,-1675520,-5748417,
 -16711680,-42784577,-98951424,-210164577,
 -413204480,-748621857,-1207353600,-1489148801,0,
 10204111743,57699516160,257894343903,
 1073911627776]