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A140429 as a simple table

na(n)
00
11
23
39
427
581
6243
7729
82187
96561
1019683
1159049
12177147
13531441
141594323
154782969
1614348907
1743046721
18129140163
19387420489
201162261467
213486784401
2210460353203
2331381059609
2494143178827
25282429536481
26847288609443

[0,1,3,9,27,81,243,729,2187,6561,19683,59049,
 177147,531441,1594323,4782969,14348907,43046721,
 129140163,387420489,1162261467,3486784401,
 10460353203,31381059609,94143178827,282429536481,
 847288609443]