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A053702 as a simple table

na(n)
19
227
381
4125
56561
624389
759049
8161051
9357911
10571787
111442897
124782969
135177717
1414348907
1518191447
1630080231
1773560059
1880062991
19118370771
20127263527
21131872229
22318611987
23344472101
24440711081
25461889917
26590589719
27756058031
28865523177

[9,27,81,125,6561,24389,59049,161051,357911,
 571787,1442897,4782969,5177717,14348907,18191447,
 30080231,73560059,80062991,118370771,127263527,
 131872229,318611987,344472101,440711081,461889917,
 590589719,756058031,865523177]