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| n | a(n) |
|---|---|
| 4 | 10 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 55 |
| 9 | 150 |
| 10 | 210 |
| 11 | 280 |
| 12 | 580 |
| 13 | 1275 |
| 14 | 2905 |
| 15 | 5350 |
| 16 | 9985 |
| 17 | 17965 |
| 18 | 33665 |
| 19 | 62895 |
| 20 | 117287 |
| 21 | 214610 |
| 22 | 389805 |
| 23 | 700720 |
| 24 | 1259890 |
| 25 | 2250405 |
| 26 | 4008717 |
| 27 | 7092366 |
| 28 | 12497237 |
| 29 | 21904825 |
| 30 | 38253450 |
| 31 | 66511772 |
| 32 | 115230973 |
| 33 | 198829023 |
| 34 | 341874534 |
| 35 | 585658726 |
[10,0,0,0,55,150,210,280,580,1275,2905,5350,9985, 17965,33665,62895,117287,214610,389805,700720, 1259890,2250405,4008717,7092366,12497237,21904825, 38253450,66511772,115230973,198829023,341874534, 585658726] |