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A130752 as a simple table

na(n)
02
15
29
316
431
563
6128
7257
8513
91024
102047
114095
128192
1316385
1432769
1565536
16131071
17262143
18524288
191048577
202097153
214194304
228388607
2316777215
2433554432
2567108865
26134217729
27268435456
28536870911
291073741823
302147483648
314294967297
328589934593

[2,5,9,16,31,63,128,257,513,1024,2047,4095,8192,
 16385,32769,65536,131071,262143,524288,1048577,
 2097153,4194304,8388607,16777215,33554432,
 67108865,134217729,268435456,536870911,1073741823,
 2147483648,4294967297,8589934593]