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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 6 |
| 4 | 48 |
| 5 | 240 |
| 6 | 840 |
| 7 | 2310 |
| 8 | 5376 |
| 9 | 11088 |
| 10 | 20880 |
| 11 | 36630 |
| 12 | 60720 |
| 13 | 96096 |
| 14 | 146328 |
| 15 | 215670 |
| 16 | 309120 |
| 17 | 432480 |
| 18 | 592416 |
| 19 | 796518 |
| 20 | 1053360 |
| 21 | 1372560 |
| 22 | 1764840 |
| 23 | 2242086 |
| 24 | 2817408 |
| 25 | 3505200 |
| 26 | 4321200 |
| 27 | 5282550 |
| 28 | 6407856 |
| 29 | 7717248 |
| 30 | 9232440 |
| 31 | 10976790 |
| 32 | 12975360 |
| 33 | 15254976 |
| 34 | 17844288 |
| 35 | 20773830 |
[0,0,0,6,48,240,840,2310,5376,11088,20880,36630, 60720,96096,146328,215670,309120,432480,592416, 796518,1053360,1372560,1764840,2242086,2817408, 3505200,4321200,5282550,6407856,7717248,9232440, 10976790,12975360,15254976,17844288,20773830] |