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A038484 as a simple table

na(n)
19
265
372
4513
5520
6576
74097
84104
94160
104608
1132769
1232776
1332832
1433280
1536864
16262145
17262152
18262208
19262656
20266240
21294912
222097153
232097160
242097216
252097664
262101248
272129920
282359296
2916777217
3016777224
3116777280
3216777728
3316781312
3416809984
3517039360
3618874368

[9,65,72,513,520,576,4097,4104,4160,4608,32769,
 32776,32832,33280,36864,262145,262152,262208,
 262656,266240,294912,2097153,2097160,2097216,
 2097664,2101248,2129920,2359296,16777217,16777224,
 16777280,16777728,16781312,16809984,17039360,
 18874368]