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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 0 |
| 5 | 5 |
| 6 | 6 |
| 7 | 9 |
| 8 | 35 |
| 9 | 63 |
| 10 | 118 |
| 11 | 305 |
| 12 | 753 |
| 13 | 1599 |
| 14 | 3665 |
| 15 | 9503 |
| 16 | 22510 |
| 17 | 52352 |
| 18 | 133994 |
| 19 | 336327 |
| 20 | 831008 |
| 21 | 2138550 |
| 22 | 5541862 |
| 23 | 14304912 |
| 24 | 37456378 |
| 25 | 98820891 |
| 26 | 260803473 |
| 27 | 691050714 |
| 28 | 1838094729 |
| 29 | 4893315369 |
| 30 | 13039154698 |
| 31 | 34800122439 |
[0,0,5,6,9,35,63,118,305,753,1599,3665,9503,22510, 52352,133994,336327,831008,2138550,5541862, 14304912,37456378,98820891,260803473,691050714, 1838094729,4893315369,13039154698,34800122439] |