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A053939 as a simple table

na(n)
14
236
364
43364
54443664
6443433464464
7466363336464
843346343434436
946443434463364
103436643466443664
1133663346434644644
126344433646663343363344
13444336446434444344644644
144333643333666334466333636
154464644636363464333646646666664464
1644444633333463334436443663666646446336

[4,36,64,3364,4443664,443433464464,466363336464,
 43346343434436,46443434463364,3436643466443664,
 33663346434644644,6344433646663343363344,
 444336446434444344644644,
 4333643333666334466333636,
 4464644636363464333646646666664464,
 44444633333463334436443663666646446336]