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A303500 as a simple table

na(n)
02
121
2210
32101
421011
5210110
62101100
721011000
8210110001
92101100011
1021011000110
11210110001101
122101100011010
1321011000110100
14210110001101001
152101100011010011
1621011000110100110
17210110001101001101

[2,21,210,2101,21011,210110,2101100,21011000,
 210110001,2101100011,21011000110,210110001101,
 2101100011010,21011000110100,210110001101001,
 2101100011010011,21011000110100110,
 210110001101001101]