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A108733 as a simple table

na(n)
01
16
2-36
3360
4-4320
557024
6-798336
711632896
8-174493440
92675566080
10-41738830848
11660232415232
12-10563718643712
13170644685783040
14-2779070597038080
1545576757791424512
16-752016503558504448
1712474626706088132608
18-207910445101468876800
193479764291698268569600

[1,6,-36,360,-4320,57024,-798336,11632896,
 -174493440,2675566080,-41738830848,660232415232,
 -10563718643712,170644685783040,-2779070597038080,
 45576757791424512,-752016503558504448,
 12474626706088132608,-207910445101468876800,
 3479764291698268569600]