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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 50 |
| 3 | 433 |
| 4 | 4383 |
| 5 | 45907 |
| 6 | 448649 |
| 7 | 3889553 |
| 8 | 29520031 |
| 9 | 197001842 |
| 10 | 1168481498 |
| 11 | 6234449897 |
| 12 | 30265682491 |
| 13 | 135048855227 |
| 14 | 558800630541 |
| 15 | 2160517610564 |
| 16 | 7856777499625 |
| 17 | 27025799141430 |
| 18 | 88367939113010 |
| 19 | 275837411169430 |
[7,50,433,4383,45907,448649,3889553,29520031, 197001842,1168481498,6234449897,30265682491, 135048855227,558800630541,2160517610564, 7856777499625,27025799141430,88367939113010, 275837411169430] |