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A028359 as a simple table

na(n)
11
22
312
4121
5212
61212
712121
821212
9121212
101212121
112121212
1212121212
13121212121
14212121212
151212121212
1612121212121
1721212121212
18121212121212
191212121212121
202121212121212
2112121212121212
22121212121212121
23212121212121212
241212121212121212
2512121212121212121

[1,2,12,121,212,1212,12121,21212,121212,1212121,
 2121212,12121212,121212121,212121212,1212121212,
 12121212121,21212121212,121212121212,
 1212121212121,2121212121212,12121212121212,
 121212121212121,212121212121212,1212121212121212,
 12121212121212121]