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A067448 as a simple table

na(n)
17
2729
3729
4707281
57776
6729
778125
878310985281
9794280046581
1079792266297612001
11743008370688
127355827511386641
13793714773254144
1478364164096
15734461618571137961752599
1679766443076872509863361

[7,729,729,707281,7776,729,78125,78310985281,
 794280046581,79792266297612001,743008370688,
 7355827511386641,793714773254144,78364164096,
 734461618571137961752599,79766443076872509863361]