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A086341 as a simple table

na(n)
01
13
23
35
47
59
615
717
831
933
1063
1165
12127
13129
14255
15257
16511
17513
181023
191025
202047
212049
224095
234097
248191
258193
2616383
2716385
2832767
2932769
3065535
3165537
32131071
33131073
34262143
35262145
36524287
37524289
381048575
391048577
402097151
412097153

[1,3,3,5,7,9,15,17,31,33,63,65,127,129,255,257,
 511,513,1023,1025,2047,2049,4095,4097,8191,8193,
 16383,16385,32767,32769,65535,65537,131071,131073,
 262143,262145,524287,524289,1048575,1048577,
 2097151,2097153]