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A288873 as a simple table

na(n)
01
1-2
28
30
4-128
50
62048
70
8-32768
90
102621440
110
12-5796528128
130
14939524096
150
16-7767448354816
170
181507258642989056
190
20-95993412418797568
210
227516375836686024704
230
24-33265288504730187726848
250
2619259875741830735724544
270
28-855664510723636131971203072
290
304966694343692730467779807805440

[1,-2,8,0,-128,0,2048,0,-32768,0,2621440,0,
 -5796528128,0,939524096,0,-7767448354816,0,
 1507258642989056,0,-95993412418797568,0,
 7516375836686024704,0,-33265288504730187726848,0,
 19259875741830735724544,0,
 -855664510723636131971203072,0,
 4966694343692730467779807805440]