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A270009 as a simple table

na(n)
07
1-8
249
3-49
4121
5-121
6225
7-225
8361
9-361
10529
11-529
12729
13-729
14961
15-961
161225
17-1225
181521
19-1521
201849
21-1849
222209
23-2209
242601
25-2601
263025
27-3025
283481
29-3481
303969
31-3969
324489
33-4489
345041
35-5041
365625
37-5625
386241
39-6241
406889
41-6889
427569

[7,-8,49,-49,121,-121,225,-225,361,-361,529,-529,
 729,-729,961,-961,1225,-1225,1521,-1521,1849,
 -1849,2209,-2209,2601,-2601,3025,-3025,3481,-3481,
 3969,-3969,4489,-4489,5041,-5041,5625,-5625,6241,
 -6241,6889,-6889,7569]