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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 7 |
| 4 | 46 |
| 5 | 53 |
| 6 | 99 |
| 7 | 350 |
| 8 | 9899 |
| 9 | 30047 |
| 10 | 39946 |
| 11 | 69993 |
| 12 | 459904 |
| 13 | 529897 |
| 14 | 989801 |
| 15 | 3499300 |
| 16 | 98970201 |
| 17 | 300409903 |
| 18 | 399380104 |
| 19 | 699790007 |
| 20 | 4598120146 |
| 21 | 5297910153 |
| 22 | 9896030299 |
| 23 | 34986001050 |
| 24 | 989504059699 |
| 25 | 3003498180147 |
| 26 | 3993002239846 |
| 27 | 6996500419993 |
| 28 | 45972004759804 |
[1,3,4,7,46,53,99,350,9899,30047,39946,69993, 459904,529897,989801,3499300,98970201,300409903, 399380104,699790007,4598120146,5297910153, 9896030299,34986001050,989504059699,3003498180147, 3993002239846,6996500419993,45972004759804] |