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A231997 as a simple table

na(n)
14
26
39
416
532
625
739
8121
9156
1064
1181
12406
131024
14800
15169
16168
171225
185778
198464
204000
21441
22361
233916
2428900
2580511
2670225
2720228
281156
29780
3012769
31155496
32674041
331129755
34582169
35101808
363025
371681
3841180
39863041
406257919
4115594601
4215851094

[4,6,9,16,32,25,39,121,156,64,81,406,1024,800,169,
 168,1225,5778,8464,4000,441,361,3916,28900,80511,
 70225,20228,1156,780,12769,155496,674041,1129755,
 582169,101808,3025,1681,41180,863041,6257919,
 15594601,15851094]