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A260521 as a simple table

na(n)
01
110
2100
31000
410000
5100000
61000000
710000000
8100000000
91000000000
1021
11120
12120
131020
1410020
15100020
161000020
1710000020
18100000020
191000000020
20201
21210
221200
231200
2410200
25100200
261000200
2710000200
28100000200
291000000200

[1,10,100,1000,10000,100000,1000000,10000000,
 100000000,1000000000,21,120,120,1020,10020,100020,
 1000020,10000020,100000020,1000000020,201,210,
 1200,1200,10200,100200,1000200,10000200,100000200,
 1000000200]