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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1026 |
| 4 | 119124 |
| 5 | 82094580 |
| 6 | 1126524259080 |
| 7 | 5563004909321160 |
| 8 | 43453047082604239080 |
| 9 | 620787527477497337506920 |
| 10 | 82539616591562766578923554000 |
| 11 | 8875098123308028836585309148354000 |
| 12 | 891186933432311275150434427455009708000 |
[1,1,2,1026,119124,82094580,1126524259080, 5563004909321160,43453047082604239080, 620787527477497337506920, 82539616591562766578923554000, 8875098123308028836585309148354000, 891186933432311275150434427455009708000] |