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A351421 as a simple table

na(n)
11
2-1
33
4-13
577
6-576
75219
8-55567
9680028
10-9405302
11145067040
12-2468571128
1345936991110
14-927915150852
1520219040931738
16-472697857817078
1711801903989774760
18-313395752536945568
198819464678850030936
20-262185434197432956664
218210080944919085511680

[1,-1,3,-13,77,-576,5219,-55567,680028,-9405302,
 145067040,-2468571128,45936991110,-927915150852,
 20219040931738,-472697857817078,11801903989774760,
 -313395752536945568,8819464678850030936,
 -262185434197432956664,8210080944919085511680]