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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 212 |
| 3 | 3212321 |
| 4 | 4321234321234 |
| 5 | 543212345432123454321 |
| 6 | 6543212345654321234565432123456 |
| 7 | 7654321234567654321234567654321234567654321 |
[1,212,3212321,4321234321234, 543212345432123454321, 6543212345654321234565432123456, 7654321234567654321234567654321234567654321] |