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A175840 as a simple table

na(n)
01
13
22
39
46
54
627
718
812
98
1081
1154
1236
1324
1416
15243
16162
17108
1872
1948
2032
21729
22486
23324
24216
25144
2696
2764
282187
291458
30972
31648
32432
33288
34192
35128
366561
374374
382916
391944
401296
41864
42576
43384
44256
4519683
4613122
478748
485832
493888
502592
511728
521152
53768
54512

[1,3,2,9,6,4,27,18,12,8,81,54,36,24,16,243,162,
 108,72,48,32,729,486,324,216,144,96,64,2187,1458,
 972,648,432,288,192,128,6561,4374,2916,1944,1296,
 864,576,384,256,19683,13122,8748,5832,3888,2592,
 1728,1152,768,512]