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A318993 as a simple table

na(n)
11
22
34
43
58
67
716
85
99
1019
1132
1217
1364
1453
1511
16128
1723
18256
1967
2049
21131
22512
2359
2427
25311
2625
27241
281024
292048
3031
31719
3283
334096
341619
35361
36331
378192
38227
3916384
40739
413671
4232768
43277
4481
45103
462063
4765536
4897
491523
502809
518161
52131072
53262144
5417863

[1,2,4,3,8,7,16,5,9,19,32,17,64,53,11,128,23,256,
 67,49,131,512,59,27,311,25,241,1024,2048,31,719,
 83,4096,1619,361,331,8192,227,16384,739,3671,
 32768,277,81,103,2063,65536,97,1523,2809,8161,
 131072,262144,17863]