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A048623 as a simple table

na(n)
12
23
34
45
59
66
710
817
98
1033
1118
1265
1312
14129
1534
16257
1716
1866
1920
20130
21513
221025
2336
24258
252049
2624
274097
2868
298193
30514
3140
321026
3316385
34132
3532769
362050
37260
3865537
3972
4032
41131073
424098
438194
44136
45262145
4616386
47524289
4848
49516
501048577
511028

[2,3,4,5,9,6,10,17,8,33,18,65,12,129,34,257,16,66,
 20,130,513,1025,36,258,2049,24,4097,68,8193,514,
 40,1026,16385,132,32769,2050,260,65537,72,32,
 131073,4098,8194,136,262145,16386,524289,48,516,
 1048577,1028]