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A207800 as a simple table

na(n)
11
22
33
44
57
68
75
816
915
1032
116
1264
1311
14128
159
16256
1731
18512
1910
201024
2113
222048
2312
244096
2523
268192
2717
2816384
2914
3032768
3118
3265536
3363
34131072
3520
36262144
3719
38524288
3924
401048576
4127
422097152
4333
444194304
4521
468388608
4734
4816777216
4947
5033554432
5136
5267108864
5322
54134217728
5540

[1,2,3,4,7,8,5,16,15,32,6,64,11,128,9,256,31,512,
 10,1024,13,2048,12,4096,23,8192,17,16384,14,32768,
 18,65536,63,131072,20,262144,19,524288,24,1048576,
 27,2097152,33,4194304,21,8388608,34,16777216,47,
 33554432,36,67108864,22,134217728,40]