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A001167 as a simple table

na(n)
11
221
321000
4101
5121
61101
71121
821121
9101101
10101121
11121121
121101121
131121121
1421121121
15101101121
16101121121
17121121121
181101121121
191121121121
2021121121121
21101101121121
22101121121121
23121121121121
241101121121121
251121121121121
2621121121121121

[1,21,21000,101,121,1101,1121,21121,101101,101121,
 121121,1101121,1121121,21121121,101101121,
 101121121,121121121,1101121121,1121121121,
 21121121121,101101121121,101121121121,
 121121121121,1101121121121,1121121121121,
 21121121121121]