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A305552 as a simple table

na(n)
01
11
23
35
412
517
647
765
8170
9277
10655
111025
122739
134097
1410281
1517257
1641364
1765537
18170047
19262145
20660296
211094457
222621965
234194305
2410898799
2516792721
2641945103
2769938141
28168546184
29268435457
30694029255
311073741825
322696094037
334474449261
3410737451027

[1,1,3,5,12,17,47,65,170,277,655,1025,2739,4097,
 10281,17257,41364,65537,170047,262145,660296,
 1094457,2621965,4194305,10898799,16792721,
 41945103,69938141,168546184,268435457,694029255,
 1073741825,2696094037,4474449261,10737451027]