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A018869 as a simple table

na(n)
11
2282429536481
3387420489
44782969
559049
66561
7729
881
99
10109418989131512359209
1111972515182562019788602740026717047105681
1212157665459056928801
131350851717672992089

[1,282429536481,387420489,4782969,59049,6561,729,
 81,9,109418989131512359209,
 11972515182562019788602740026717047105681,
 12157665459056928801,1350851717672992089]