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| n | a(n) |
|---|---|
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 3 |
| 10 | 8 |
| 11 | 22 |
| 12 | 60 |
| 13 | 168 |
| 14 | 466 |
| 15 | 1306 |
| 16 | 3677 |
| 17 | 10400 |
| 18 | 29503 |
| 19 | 83969 |
| 20 | 239533 |
| 21 | 684880 |
| 22 | 1961986 |
| 23 | 5630451 |
| 24 | 16182950 |
| 25 | 46577929 |
| 26 | 134228796 |
| 27 | 387264335 |
| 28 | 1118459507 |
| 29 | 3233302665 |
| 30 | 9355173164 |
| 31 | 27089886520 |
| 32 | 78502923212 |
| 33 | 227648300409 |
| 34 | 660574571072 |
| 35 | 1917958785876 |
| 36 | 5571852459248 |
[0,1,1,3,8,22,60,168,466,1306,3677,10400,29503, 83969,239533,684880,1961986,5630451,16182950, 46577929,134228796,387264335,1118459507, 3233302665,9355173164,27089886520,78502923212, 227648300409,660574571072,1917958785876, 5571852459248] |