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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 4 |
| 5 | 6 |
| 6 | 0 |
| 7 | 0 |
| 8 | 120 |
| 9 | 190 |
| 10 | 0 |
| 11 | 0 |
| 12 | 7140 |
| 13 | 11480 |
| 14 | 0 |
| 15 | 0 |
| 16 | 635376 |
| 17 | 1028790 |
| 18 | 0 |
| 19 | 0 |
| 20 | 75287520 |
| 21 | 122391522 |
| 22 | 0 |
| 23 | 0 |
| 24 | 11143364232 |
| 25 | 18161699556 |
| 26 | 0 |
| 27 | 0 |
| 28 | 1978369382080 |
| 29 | 3230129794320 |
| 30 | 0 |
| 31 | 0 |
| 32 | 409663695276000 |
| 33 | 669741609663270 |
| 34 | 0 |
| 35 | 0 |
| 36 | 96930293990660064 |
| 37 | 158625578809472060 |
[1,0,0,4,6,0,0,120,190,0,0,7140,11480,0,0,635376, 1028790,0,0,75287520,122391522,0,0,11143364232, 18161699556,0,0,1978369382080,3230129794320,0,0, 409663695276000,669741609663270,0,0, 96930293990660064,158625578809472060] |