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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 504 |
| 4 | 24384 |
| 5 | 2375296 |
| 6 | 338479232 |
| 7 | 64501554688 |
| 8 | 16130341302272 |
| 9 | 5112670099460096 |
| 10 | 2003580047549120512 |
| 11 | 951418445045046378496 |
| 12 | 538352433444301745848320 |
| 13 | 357916525207050277213175808 |
[1,0,0,504,24384,2375296,338479232,64501554688, 16130341302272,5112670099460096, 2003580047549120512,951418445045046378496, 538352433444301745848320, 357916525207050277213175808] |