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A191145 as a simple table

na(n)
11
25
37
417
523
631
753
871
995
10127
11161
12215
13287
14383
15485
16511
17647
18863
191151
201457
211535
221943
232047
242591
253455
264373
274607
285831
296143
307775
318191
3210367
3313121
3413823
3517495
3618431
3723327
3824575
3931103
4032767
4139365
4241471
4352487
4455295
4569983
4673727
4793311
4898303
49118097
50124415
51131071
52157463
53165887

[1,5,7,17,23,31,53,71,95,127,161,215,287,383,485,
 511,647,863,1151,1457,1535,1943,2047,2591,3455,
 4373,4607,5831,6143,7775,8191,10367,13121,13823,
 17495,18431,23327,24575,31103,32767,39365,41471,
 52487,55295,69983,73727,93311,98303,118097,124415,
 131071,157463,165887]