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A069281 as a simple table

na(n)
11048576
21572864
32359296
42621440
53538944
63670016
73932160
85308416
95505024
105767168
115898240
126553600
136815744
147962624
158257536
168650752
178847360
188912896
199175040
209830400
219961472
2210223616
2311943936
2412058624

[1048576,1572864,2359296,2621440,3538944,3670016,
 3932160,5308416,5505024,5767168,5898240,6553600,
 6815744,7962624,8257536,8650752,8847360,8912896,
 9175040,9830400,9961472,10223616,11943936,
 12058624]