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A117254 as a simple table

na(n)
01
11
21
3-6
44
51
6224
7-96
816
91
10-39424
1114336
12-1536
1364
141
1530277632
16-10092544
17917504
18-24576
19256
201
21-98180268032
2231004295168
23-2583691264
2458720256
25-393216
261024
271
281321338098679808
29-402146377859072
3031748398252032
31-661424963584
323758096384
33-6291456
344096
351

[1,1,1,-6,4,1,224,-96,16,1,-39424,14336,-1536,64,
 1,30277632,-10092544,917504,-24576,256,1,
 -98180268032,31004295168,-2583691264,58720256,
 -393216,1024,1,1321338098679808,-402146377859072,
 31748398252032,-661424963584,3758096384,-6291456,
 4096,1]