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A052552 as a simple table

na(n)
02
11
23
31
45
51
69
71
817
91
1033
111
1265
131
14129
151
16257
171
18513
191
201025
211
222049
231
244097
251
268193
271
2816385
291
3032769
311
3265537
331
34131073
351
36262145
371
38524289
391
401048577
411
422097153
431
444194305
451
468388609
471
4816777217
491
5033554433
511
5267108865
531

[2,1,3,1,5,1,9,1,17,1,33,1,65,1,129,1,257,1,513,1,
 1025,1,2049,1,4097,1,8193,1,16385,1,32769,1,65537,
 1,131073,1,262145,1,524289,1,1048577,1,2097153,1,
 4194305,1,8388609,1,16777217,1,33554433,1,
 67108865,1]