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A270693 as a simple table

na(n)
01
1-25
251
3-100
4151
5-225
6301
7-400
8501
9-625
10751
11-900
121051
13-1225
141401
15-1600
161801
17-2025
182251
19-2500
202751
21-3025
223301
23-3600
243901
25-4225
264551
27-4900
285251
29-5625
306001
31-6400
326801
33-7225
347651
35-8100
368551
37-9025
389501
39-10000
4010501

[1,-25,51,-100,151,-225,301,-400,501,-625,751,
 -900,1051,-1225,1401,-1600,1801,-2025,2251,-2500,
 2751,-3025,3301,-3600,3901,-4225,4551,-4900,5251,
 -5625,6001,-6400,6801,-7225,7651,-8100,8551,-9025,
 9501,-10000,10501]