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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 12 |
| 6 | 72 |
| 7 | 252 |
| 8 | 672 |
| 9 | 1512 |
| 10 | 3024 |
| 11 | 5544 |
| 12 | 9504 |
| 13 | 15444 |
| 14 | 24024 |
| 15 | 36036 |
| 16 | 52416 |
| 17 | 74256 |
| 18 | 102816 |
| 19 | 139536 |
| 20 | 186048 |
| 21 | 244188 |
| 22 | 316008 |
| 23 | 403788 |
| 24 | 510048 |
| 25 | 637560 |
| 26 | 789360 |
| 27 | 968760 |
| 28 | 1179360 |
| 29 | 1425060 |
| 30 | 1710072 |
| 31 | 2038932 |
| 32 | 2416512 |
| 33 | 2848032 |
| 34 | 3339072 |
| 35 | 3895584 |
| 36 | 4523904 |
| 37 | 5230764 |
[0,0,0,0,0,12,72,252,672,1512,3024,5544,9504, 15444,24024,36036,52416,74256,102816,139536, 186048,244188,316008,403788,510048,637560,789360, 968760,1179360,1425060,1710072,2038932,2416512, 2848032,3339072,3895584,4523904,5230764] |