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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 5 |
| 6 | 13 |
| 7 | 103 |
| 8 | 302 |
| 9 | 1182 |
| 10 | 2676 |
| 11 | 7472 |
| 12 | 14368 |
| 13 | 32620 |
| 14 | 55157 |
| 15 | 110783 |
| 16 | 172932 |
| 17 | 315241 |
| 18 | 457366 |
| 19 | 783739 |
| 20 | 1088297 |
| 21 | 1750273 |
| 22 | 2335589 |
| 23 | 3624725 |
| 24 | 4656872 |
| 25 | 6991039 |
| 26 | 8758150 |
| 27 | 12682152 |
| 28 | 15651854 |
| 29 | 22182704 |
| 30 | 26463796 |
| 31 | 37062084 |
| 32 | 43858102 |
| 33 | 59401343 |
[0,0,0,0,5,13,103,302,1182,2676,7472,14368,32620, 55157,110783,172932,315241,457366,783739,1088297, 1750273,2335589,3624725,4656872,6991039,8758150, 12682152,15651854,22182704,26463796,37062084, 43858102,59401343] |