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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 12 |
| 4 | 212 |
| 5 | 2120 |
| 6 | 2124 |
| 7 | 42126 |
| 8 | 621240 |
| 9 | 421263 |
| 10 | 3621240 |
| 11 | 4212637 |
| 12 | 73621248 |
| 13 | 842126376 |
| 14 | 67362124802 |
| 15 | 2084212637610 |
| 16 | 16736212480208 |
| 17 | 802084212637617 |
| 18 | 7167362124802086 |
| 19 | 680208421263761709 |
| 20 | 9071673621248020860 |
[1,10,12,212,2120,2124,42126,621240,421263, 3621240,4212637,73621248,842126376,67362124802, 2084212637610,16736212480208,802084212637617, 7167362124802086,680208421263761709, 9071673621248020860] |