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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 0 |
| 11 | 10 |
| 12 | 10 |
| 13 | 65 |
| 14 | 120 |
| 15 | 395 |
| 16 | 890 |
| 17 | 2320 |
| 18 | 5401 |
| 19 | 12857 |
| 20 | 29435 |
| 21 | 66955 |
| 22 | 149455 |
| 23 | 330042 |
| 24 | 719882 |
| 25 | 1554760 |
| 26 | 3326365 |
| 27 | 7009606 |
| 28 | 14772370 |
| 29 | 30835912 |
| 30 | 63443345 |
| 31 | 130298990 |
| 32 | 266321547 |
| 33 | 538824877 |
| 34 | 1082905293 |
| 35 | 2168501310 |
| 36 | 4319287751 |
| 37 | 8538816117 |
| 38 | 16795672263 |
| 39 | 32926171923 |
[1,0,10,10,65,120,395,890,2320,5401,12857,29435, 66955,149455,330042,719882,1554760,3326365, 7009606,14772370,30835912,63443345,130298990, 266321547,538824877,1082905293,2168501310, 4319287751,8538816117,16795672263,32926171923] |