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A272102 as a simple table

na(n)
11
20
31
40
5-4
69
70
816
9-180
10225
110
12-64
133024
14-12600
1511025
160
17256
18-48960
19529200
20-1323000
21893025
220
23-1024
24785664
25-20275200
26110602800
27-196465500
28108056025
290
304096
31-12579840
32749548800
33-8072064000
3428605376800
35-39332393100
3618261468225

[1,0,1,0,-4,9,0,16,-180,225,0,-64,3024,-12600,
 11025,0,256,-48960,529200,-1323000,893025,0,-1024,
 785664,-20275200,110602800,-196465500,108056025,0,
 4096,-12579840,749548800,-8072064000,28605376800,
 -39332393100,18261468225]