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A294458 as a simple table

na(n)
01
1-1
20
3-2
48
5-24
664
7-160
88448
9-86912
10509696
11-1449216
1244615680
13-366395392
143315376128
15-190488356864
164591008579584
17-33244620718080
1886342088982528
19-2543409132470272
20136456182420996096
21-5644134983026343936
22103753337226615848960

[1,-1,0,-2,8,-24,64,-160,8448,-86912,509696,
 -1449216,44615680,-366395392,3315376128,
 -190488356864,4591008579584,-33244620718080,
 86342088982528,-2543409132470272,
 136456182420996096,-5644134983026343936,
 103753337226615848960]