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A320641 as a simple table

na(n)
11
22
33
45
59
617
767
8193
91069
102137
114273
1234183
13205097
14990361
1511884331
1638294881
1776589761
18574396453
1910339136153
2036177024721
2172354049441
22144708098881

[1,2,3,5,9,17,67,193,1069,2137,4273,34183,205097,
 990361,11884331,38294881,76589761,574396453,
 10339136153,36177024721,72354049441,144708098881]