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A128901 as a simple table

na(n)
10
21
32
44
58
616
732
863
9128
10255
11510
121020
132032
144048
158109
1616216
1732434
1864731
19129597
20258718
21517424
221034430
232067780
244132038
258262934
2616515320
2733021972
2866029987
29132008983
30263944002
31527772375
321055126462

[0,1,2,4,8,16,32,63,128,255,510,1020,2032,4048,
 8109,16216,32434,64731,129597,258718,517424,
 1034430,2067780,4132038,8262934,16515320,33021972,
 66029987,132008983,263944002,527772375,1055126462]