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A123588 as a simple table

na(n)
00
11
2-1
30
44
5-4
61
7-9
824
9-16
100
1116
12-80
13128
14-64
151
16-25
17200
18-560
19640
20-256
210
2236
23-420
241792
25-3456
263072
27-1024
281
29-49
30784
31-4704
3213440
33-19712
3414336
35-4096
360
3764
38-1344
3910752
40-42240
4190112
42-106496
4365536
44-16384
451
46-81
472160
48-22176
49114048
50-329472
51559104
52-552960
53294912

[0,1,-1,0,4,-4,1,-9,24,-16,0,16,-80,128,-64,1,-25,
 200,-560,640,-256,0,36,-420,1792,-3456,3072,-1024,
 1,-49,784,-4704,13440,-19712,14336,-4096,0,64,
 -1344,10752,-42240,90112,-106496,65536,-16384,1,
 -81,2160,-22176,114048,-329472,559104,-552960,
 294912]