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A075150 as a simple table

na(n)
04
1-1
29
3-16
449
5-121
6324
7-841
82209
9-5776
1015129
11-39601
12103684
13-271441
14710649
15-1860496
164870849
17-12752041
1833385284
19-87403801
20228826129
21-599074576
221568397609
23-4106118241
2410749957124
25-28143753121
2673681302249
27-192900153616
28505019158609
29-1322157322201

[4,-1,9,-16,49,-121,324,-841,2209,-5776,15129,
 -39601,103684,-271441,710649,-1860496,4870849,
 -12752041,33385284,-87403801,228826129,-599074576,
 1568397609,-4106118241,10749957124,-28143753121,
 73681302249,-192900153616,505019158609,
 -1322157322201]