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A179280 as a simple table

na(n)
01
11
20
3-9
448
5350
6-11160
773010
82607360
9-84724380
10274118400
1158934005900
12-1878039820800
13-11920073789000
142984939450438400
15-86257610003799000
16-2337484592701440000
17281472063119891306000
18-6445251832278924288000

[1,1,0,-9,48,350,-11160,73010,2607360,-84724380,
 274118400,58934005900,-1878039820800,
 -11920073789000,2984939450438400,
 -86257610003799000,-2337484592701440000,
 281472063119891306000,-6445251832278924288000]