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A251606 as a simple table

na(n)
14
28
39
410
516
620
721
825
927
1032
1140
1249
1350
1455
1563
1664
1780
1881
19100
20102
21121
22125
23128
24147
25160
26169
27189
28200
29204
30243
31250
32253
33256
34275
35289
36306
37320
38343
39361
40400
41408
42441
43500
44512
45529
46567
47605
48612
49625
50640
51729
52800
53816
54841
55918
56961

[4,8,9,10,16,20,21,25,27,32,40,49,50,55,63,64,80,
 81,100,102,121,125,128,147,160,169,189,200,204,
 243,250,253,256,275,289,306,320,343,361,400,408,
 441,500,512,529,567,605,612,625,640,729,800,816,
 841,918,961]