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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 66 |
| 4 | 858 |
| 5 | 6006 |
| 6 | 66066 |
| 7 | 858858 |
| 8 | 222444222 |
| 9 | 444888444 |
| 10 | 21354645312 |
| 11 | 21375999957312 |
| 12 | 211643775577346112 |
| 13 | 211432343445544343234112 |
| 14 | 21354666687999978666645312 |
| 15 | 211432554877887788778455234112 |
| 16 | 211221333755564778877465557333122112 |
[3,6,66,858,6006,66066,858858,222444222,444888444, 21354645312,21375999957312,211643775577346112, 211432343445544343234112, 21354666687999978666645312, 211432554877887788778455234112, 211221333755564778877465557333122112] |