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A057048 as a simple table

na(n)
01
12
23
34
46
58
611
716
823
932
1045
1164
1291
13128
14181
15256
16362
17512
18724
191024
201448
212048
222896
234096
245793
258192
2611585
2716384
2823170
2932768
3046341
3165536
3292682
33131072
34185364
35262144
36370728
37524288
38741455
391048576

[1,2,3,4,6,8,11,16,23,32,45,64,91,128,181,256,362,
 512,724,1024,1448,2048,2896,4096,5793,8192,11585,
 16384,23170,32768,46341,65536,92682,131072,185364,
 262144,370728,524288,741455,1048576]