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A017670 as a simple table

na(n)
11
28
327
464
5125
66
7343
8512
9729
10500
111331
12432
132197
14343
15375
164096
174913
18648
196859
204000
211323
222662
2312167
24384
2515625
268788
2719683
282744
2924389
30125
3129791
3232768
333993
3419652
356125
3646656
3750653
3813718
3959319
406400
4168921
42147
4379507
4421296
4510125

[1,8,27,64,125,6,343,512,729,500,1331,432,2197,
 343,375,4096,4913,648,6859,4000,1323,2662,12167,
 384,15625,8788,19683,2744,24389,125,29791,32768,
 3993,19652,6125,46656,50653,13718,59319,6400,
 68921,147,79507,21296,10125]