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A286080 as a simple table

na(n)
01
13
21
315
40
563
60
7255
815
91023
101
114095
124
1316383
140
1565535
16225
17262143
181
191048575
2064
214194303
220
2316777215
24224
2567108863
260
27268435455
280
291073741823
300
314294967295
3257568
3317179869183
340
3568719476735
3616448
37274877906943
380
391099511627775
400

[1,3,1,15,0,63,0,255,15,1023,1,4095,4,16383,0,
 65535,225,262143,1,1048575,64,4194303,0,16777215,
 224,67108863,0,268435455,0,1073741823,0,
 4294967295,57568,17179869183,0,68719476735,16448,
 274877906943,0,1099511627775,0]