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A165402 as a simple table

na(n)
11
221
3221
42221
522221
6222221
72222221
822222221
9222222221
102222222221
1122222222221
12222222222221
132222222222221
1422222222222221
15222222222222221
162222222222222221
1722222222222222221
18222222222222222221

[1,21,221,2221,22221,222221,2222221,22222221,
 222222221,2222222221,22222222221,222222222221,
 2222222222221,22222222222221,222222222222221,
 2222222222222221,22222222222222221,
 222222222222222221]