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A046681 as a simple table

na(n)
11
22
38
49
518
664
772
8128
9625
10729
111024
121152
131250
141458
154096
165000
175625
185832
196561
208192
219216
2211250
2313122
2415625
2531250
2632768
2740000
2845000
2946656
3052488
3159049
3265536
3380000
3493312
35117649
36118098
37125000
38235298
39262144
40294912

[1,2,8,9,18,64,72,128,625,729,1024,1152,1250,1458,
 4096,5000,5625,5832,6561,8192,9216,11250,13122,
 15625,31250,32768,40000,45000,46656,52488,59049,
 65536,80000,93312,117649,118098,125000,235298,
 262144,294912]