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A089604 as a simple table

na(n)
00
11
22
311
412
521
622
731
8112
9121
10122
11131
12212
13213
14222
15231
16312
17321
181122
191131
201212
211221
221222
231231
241312
251321
262122
272131
282212
292221
302222
312231
322312
332321
343122
353131
363212
373221
3811222

[0,1,2,11,12,21,22,31,112,121,122,131,212,213,222,
 231,312,321,1122,1131,1212,1221,1222,1231,1312,
 1321,2122,2131,2212,2221,2222,2231,2312,2321,3122,
 3131,3212,3221,11222]