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A001202 as a simple table

na(n)
10
21
310
42
5100
611
720
83
91000
10101
11110
1212
13200
1421
1530
164
1710000
181001
191010
20102
211100
22111
23120
2413
252000
26201
27210
2822
29300
3031
3140
325
33100000
3410001
3510010
361002
3710100
381011
391020
40103
4111000
421101
431110
44112
451200
46121
47130
4814
4920000
502001
512010

[0,1,10,2,100,11,20,3,1000,101,110,12,200,21,30,4,
 10000,1001,1010,102,1100,111,120,13,2000,201,210,
 22,300,31,40,5,100000,10001,10010,1002,10100,1011,
 1020,103,11000,1101,1110,112,1200,121,130,14,
 20000,2001,2010]