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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 23 |
| 3 | 233 |
| 4 | 2333 |
| 5 | 23333 |
| 6 | 233323 |
| 7 | 2333231 |
| 8 | 23332301 |
| 9 | 233323001 |
| 10 | 2333230019 |
| 11 | 23332030019 |
| 12 | 233320360019 |
| 13 | 2333203600159 |
| 14 | 23332036001959 |
| 15 | 233320360019569 |
| 16 | 2333203600195669 |
| 17 | 23332036001956469 |
| 18 | 233320360019564269 |
| 19 | 2333203600195642469 |
| 20 | 23332036001956424629 |
| 21 | 233320360019564246269 |
[2,23,233,2333,23333,233323,2333231,23332301, 233323001,2333230019,23332030019,233320360019, 2333203600159,23332036001959,233320360019569, 2333203600195669,23332036001956469, 233320360019564269,2333203600195642469, 23332036001956424629,233320360019564246269] |