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A244331 as a simple table

na(n)
10
21
33
49
523
653
7115
8241
9495
101005
112027
124073
138167
1416357
1532739
1665505
17131039
18262109
19524251
201048537
212097111
224194261
238388563
2416777169

[0,1,3,9,23,53,115,241,495,1005,2027,4073,8167,
 16357,32739,65505,131039,262109,524251,1048537,
 2097111,4194261,8388563,16777169]