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| n | a(n) |
|---|---|
| 1 | 30 |
| 2 | 264 |
| 3 | 486 |
| 4 | 1950 |
| 5 | 3480 |
| 6 | 14106 |
| 7 | 77394 |
| 8 | 472530 |
| 9 | 1494614 |
| 10 | 2868750 |
[30,264,486,1950,3480,14106,77394,472530,1494614, 2868750] |