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A137232 as a simple table

na(n)
00
10
21
3-1
48
5-12
665
7-125
8544
9-1224
104657
11-11593
1240520
13-107700
14356561
15-988901
163161728
17-9014352
1828179745
19-81795025
20252010184
21-740036124
222258722337
23-6682944653
2420273892640
25-60278338200
26182146752721
27-543273442201
281637465696648
29-4893939533892
3014726379083825

[0,0,1,-1,8,-12,65,-125,544,-1224,4657,-11593,
 40520,-107700,356561,-988901,3161728,-9014352,
 28179745,-81795025,252010184,-740036124,
 2258722337,-6682944653,20273892640,-60278338200,
 182146752721,-543273442201,1637465696648,
 -4893939533892,14726379083825]