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A108177 as a simple table

na(n)
0-1
10
21
37
48
59
615
716
817
9127
10128
11129
12255
13256
14257
152047
162048
172049
184095
194096
204097
2132767
2232768
2332769
2465535
2565536
2665537
27524287
28524288
29524289
301048575
311048576
321048577
338388607
348388608
358388609
3616777215
3716777216
3816777217
39134217727
40134217728
41134217729
42268435455

[-1,0,1,7,8,9,15,16,17,127,128,129,255,256,257,
 2047,2048,2049,4095,4096,4097,32767,32768,32769,
 65535,65536,65537,524287,524288,524289,1048575,
 1048576,1048577,8388607,8388608,8388609,16777215,
 16777216,16777217,134217727,134217728,134217729,
 268435455]