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A074000 as a simple table

na(n)
11
21
33
49
521
699
7225
8729
92187
106561
1119845
1258563
13177633
14531441
151594323
164782969
1714344533
1843059843
19129127041
20387420489
211162261467

[1,1,3,9,21,99,225,729,2187,6561,19845,58563,
 177633,531441,1594323,4782969,14344533,43059843,
 129127041,387420489,1162261467]