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A157985 as a simple table

na(n)
11
2-4
3-8
4-9
5-16
6-25
7-27
8-32
936
10-49
11-64
12-81
13100
14-121
15-125
16-128
17144
18-169
19196
20216
21225
22-243
23-256
24-289
25324
26-343
27-361
28400
29441
30484
31-512
32-529
33576
34-625
35676
36-729
37784
38-841
39900
40-961
411000
42-1024
431089
441156
451225
461296
47-1331

[1,-4,-8,-9,-16,-25,-27,-32,36,-49,-64,-81,100,
 -121,-125,-128,144,-169,196,216,225,-243,-256,
 -289,324,-343,-361,400,441,484,-512,-529,576,-625,
 676,-729,784,-841,900,-961,1000,-1024,1089,1156,
 1225,1296,-1331]