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A239206 as a simple table

na(n)
01
11
23
39
417
535
673
7147
8295
9591
101181
112363
124729
139459
1418917
1537837
1675673
17151347
18302697
19605395
201210791
212421581
224843163
239686329
2419372659
2538745319
2677490641
27154981281
28309962565
29619925129
301239850261
312479700523
324959401047
339918802097

[1,1,3,9,17,35,73,147,295,591,1181,2363,4729,9459,
 18917,37837,75673,151347,302697,605395,1210791,
 2421581,4843163,9686329,19372659,38745319,
 77490641,154981281,309962565,619925129,1239850261,
 2479700523,4959401047,9918802097]