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| n | a(n) |
|---|---|
| 0 | 16 |
| 1 | 727 |
| 2 | 70207 |
| 3 | 7002007 |
| 4 | 700020007 |
| 5 | 70000200007 |
| 6 | 7000002000007 |
| 7 | 700000020000007 |
| 8 | 70000000200000007 |
| 9 | 7000000002000000007 |
| 10 | 700000000020000000007 |
| 11 | 70000000000200000000007 |
[16,727,70207,7002007,700020007,70000200007, 7000002000007,700000020000007,70000000200000007, 7000000002000000007,700000000020000000007, 70000000000200000000007] |