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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 126 |
| 3 | 64 |
| 4 | 220 |
| 5 | 795 |
| 6 | 2814 |
| 7 | 9469 |
| 8 | 30728 |
| 9 | 95802 |
| 10 | 284725 |
| 11 | 817017 |
| 12 | 2266402 |
[1,126,64,220,795,2814,9469,30728,95802,284725, 817017,2266402] |