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A078621 as a simple table

na(n)
11
25
39
411
513
617
725
833
949
1065
1197
12129
13193
14257
15385
16513
17769
181025
191537
202049
213073
224097
236145
248193
2512289
2616385
2724577
2832769
2949153
3065537
3198305
32131073
33196609
34262145
35393217
36524289
37786433
381048577
391572865
402097153
413145729

[1,5,9,11,13,17,25,33,49,65,97,129,193,257,385,
 513,769,1025,1537,2049,3073,4097,6145,8193,12289,
 16385,24577,32769,49153,65537,98305,131073,196609,
 262145,393217,524289,786433,1048577,1572865,
 2097153,3145729]