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A051221 as a simple table

na(n)
10
21
36
49
510
619
736
839
951
1064
1175
1284
1391
1496
1599
16100
17144
18159
19199
20216
21271
22324
23375
24396
25424
26471
27516
28559
29591
30600
31639
32676
33711
34744
35775
36784
37804
38831
39856
40879
41900
42919
43936
44951
45964
46975
47984
48991
49996
50999
511000
521164
531351
541404
551536
561719
571756
581900
591999

[0,1,6,9,10,19,36,39,51,64,75,84,91,96,99,100,144,
 159,199,216,271,324,375,396,424,471,516,559,591,
 600,639,676,711,744,775,784,804,831,856,879,900,
 919,936,951,964,975,984,991,996,999,1000,1164,
 1351,1404,1536,1719,1756,1900,1999]