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A291335 as a simple table

na(n)
01
1-1
24
3-18
4128
5-1375
619224
7-328937
86594560
9-150804585
103866510000
11-109763181693
123416538258432
13-115680589167780
144232540747232224
15-166402907912306250
166995675389431382016
17-313160900844718102493
1814871520058618111804352
19-746718033885917073001959

[1,-1,4,-18,128,-1375,19224,-328937,6594560,
 -150804585,3866510000,-109763181693,3416538258432,
 -115680589167780,4232540747232224,
 -166402907912306250,6995675389431382016,
 -313160900844718102493,14871520058618111804352,
 -746718033885917073001959]