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A052950 as a simple table

na(n)
02
11
23
34
49
516
633
764
8129
9256
10513
111024
122049
134096
148193
1516384
1632769
1765536
18131073
19262144
20524289
211048576
222097153
234194304
248388609
2516777216
2633554433
2767108864
28134217729
29268435456
30536870913
311073741824
322147483649

[2,1,3,4,9,16,33,64,129,256,513,1024,2049,4096,
 8193,16384,32769,65536,131073,262144,524289,
 1048576,2097153,4194304,8388609,16777216,33554433,
 67108864,134217729,268435456,536870913,1073741824,
 2147483649]