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A319584 as a simple table

na(n)
10
21
33
45
563
665
7195
8325
9341
104095
114097
124161
1312291
1412483
1520485
1620805
1721525
1821845
19258111
20262143
21262145
22266305
23786435
24798915
251310725
261311749
271331525
281332549
291376277
301377301
311397077
321398101
3316515135
3416777215
3516777217
3616781313

[0,1,3,5,63,65,195,325,341,4095,4097,4161,12291,
 12483,20485,20805,21525,21845,258111,262143,
 262145,266305,786435,798915,1310725,1311749,
 1331525,1332549,1376277,1377301,1397077,1398101,
 16515135,16777215,16777217,16781313]