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| n | a(n) |
|---|---|
| 1 | 36 |
| 2 | 154 |
| 3 | 572 |
| 4 | 1960 |
| 5 | 6496 |
| 6 | 21240 |
| 7 | 68636 |
| 8 | 224172 |
| 9 | 727080 |
| 10 | 2404096 |
| 11 | 7887572 |
| 12 | 26445052 |
| 13 | 87756784 |
| 14 | 297663312 |
| 15 | 996763100 |
| 16 | 3410561676 |
| 17 | 11496724776 |
| 18 | 39585824560 |
| 19 | 134072951828 |
| 20 | 463716713452 |
| 21 | 1575831918928 |
| 22 | 5467770323712 |
| 23 | 18625362960764 |
[36,154,572,1960,6496,21240,68636,224172,727080, 2404096,7887572,26445052,87756784,297663312, 996763100,3410561676,11496724776,39585824560, 134072951828,463716713452,1575831918928, 5467770323712,18625362960764] |