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A331220 as a simple table

na(n)
11
24
39
416
525
635
736
849
964
1081
11100
12120
13121
14144
15165
16169
17196
18209
19224
20225
21231
22256
23285
24289
25308
26315
27324
28352
29361
30391
31399
32400
33425
34441
35480
36484
37529
38575
39576
40625
41676
42729
43784
44840
45841
46900
47957
48961
491008
501024
511080
521088
531089

[1,4,9,16,25,35,36,49,64,81,100,120,121,144,165,
 169,196,209,224,225,231,256,285,289,308,315,324,
 352,361,391,399,400,425,441,480,484,529,575,576,
 625,676,729,784,840,841,900,957,961,1008,1024,
 1080,1088,1089]