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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 21 |
| 3 | 212 |
| 4 | 21011 |
| 5 | 212022 |
| 6 | 21200101 |
| 7 | 2101100202 |
| 8 | 21202202121 |
| 9 | 2120012010112 |
| 10 | 210110211022111 |
| 11 | 2122111011101222 |
| 12 | 212001222211110201 |
| 13 | 21011210220122222102 |
| 14 | 2101100011201022201221 |
| 15 | 21202200211121122010012 |
| 16 | 2120010121200020001020211 |
| 17 | 210110211001100210002212122 |
[1,2,21,212,21011,212022,21200101,2101100202, 21202202121,2120012010112,210110211022111, 2122111011101222,212001222211110201, 21011210220122222102,2101100011201022201221, 21202200211121122010012,2120010121200020001020211, 210110211001100210002212122] |