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A158745 as a simple table

na(n)
01
12
23
33
45
54
68
79
87
917
1016
1115
1233
1331
1432
1564
1663
1765
18127
19128
20129
21255
22257
23256
24512
25513
26511
271025
281024
291023
302049
312047
322048
334096
344095
354097
368191
378192
388193
3916383
4016385
4116384
4232768
4332769
4432767
4565537
4665536
4765535
48131073
49131071
50131072
51262144

[1,2,3,3,5,4,8,9,7,17,16,15,33,31,32,64,63,65,127,
 128,129,255,257,256,512,513,511,1025,1024,1023,
 2049,2047,2048,4096,4095,4097,8191,8192,8193,
 16383,16385,16384,32768,32769,32767,65537,65536,
 65535,131073,131071,131072,262144]