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A053881 as a simple table

na(n)
11
24
3121
4144
5441
61444
7114244
82214144
911142244
10121242121
11421111441
121111422244
1344424414441
14111114222244
1511111142222244
16214222214414224
17242441124211441
18411244411422244
191111111422222244
202111211444222241

[1,4,121,144,441,1444,114244,2214144,11142244,
 121242121,421111441,1111422244,44424414441,
 111114222244,11111142222244,214222214414224,
 242441124211441,411244411422244,1111111422222244,
 2111211444222241]