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A324866 as a simple table

na(n)
10
21
33
43
57
65
715
87
96
1013
1131
1211
1363
1417
1510
1615
17127
1813
19255
2019
2123
2247
23511
2423
2528
2683
2714
2847
291023
3031
312047
3231
3354
34175
3522
3631
374095
38257
3978
4055
418191
4237
4316383
4467
4530
46799
4732767
4847
4960
5031
51250
52131
5365535
5429
5555
5671
57270
581301
59131071
6043
61262143
622735
6354
6463
65126
6695
67524287
68303
69774
7041
711048575
7255

[0,1,3,3,7,5,15,7,6,13,31,11,63,17,10,15,127,13,
 255,19,23,47,511,23,28,83,14,47,1023,31,2047,31,
 54,175,22,31,4095,257,78,55,8191,37,16383,67,30,
 799,32767,47,60,31,250,131,65535,29,55,71,270,
 1301,131071,43,262143,2735,54,63,126,95,524287,
 303,774,41,1048575,55]