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A109816 as a simple table

na(n)
11
21
31
44
52
68
79
83
927
1016
114
1264
1325
145
15125
1636
176
18216
1949
207
21343
2264
238
24512
2581
269
27729
28100
2910
301000
31121
3211
331331
34144
3512
361728
37169
3813
392197
40196
4114
422744
43225
4415
453375
46256
4716
484096
49289
5017
514913
52324
5318
545832
55361
5619
576859
58400
5920
608000

[1,1,1,4,2,8,9,3,27,16,4,64,25,5,125,36,6,216,49,
 7,343,64,8,512,81,9,729,100,10,1000,121,11,1331,
 144,12,1728,169,13,2197,196,14,2744,225,15,3375,
 256,16,4096,289,17,4913,324,18,5832,361,19,6859,
 400,20,8000]