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A287199 as a simple table

na(n)
01
13
24
33
416
515
664
763
8256
9255
101024
111023
124096
134095
1416384
1516383
1665536
1765535
18262144
19262143
201048576
211048575
224194304
234194303
2416777216
2516777215
2667108864
2767108863
28268435456
29268435455
301073741824
311073741823
324294967296
334294967295

[1,3,4,3,16,15,64,63,256,255,1024,1023,4096,4095,
 16384,16383,65536,65535,262144,262143,1048576,
 1048575,4194304,4194303,16777216,16777215,
 67108864,67108863,268435456,268435455,1073741824,
 1073741823,4294967296,4294967295]