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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 7 |
| 4 | 22 |
| 5 | 79 |
| 6 | 289 |
| 7 | 1145 |
| 8 | 4655 |
| 9 | 19314 |
| 10 | 81242 |
| 11 | 345785 |
| 12 | 1484065 |
| 13 | 6414999 |
| 14 | 27895652 |
[2,2,7,22,79,289,1145,4655,19314,81242,345785, 1484065,6414999,27895652] |