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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6512 |
| 2 | 4086600 |
| 3 | 509911008 |
| 4 | 18944759304 |
| 5 | 266388662656 |
| 6 | 1840450801838 |
| 7 | 10754086795840 |
| 8 | 75157230205402 |
| 9 | 399699792848864 |
| 10 | 1397876167796318 |
| 11 | 4499416656998240 |
| 12 | 18657442342135966 |
| 13 | 66490911199244672 |
| 14 | 164256548772296153 |
[1,6512,4086600,509911008,18944759304, 266388662656,1840450801838,10754086795840, 75157230205402,399699792848864,1397876167796318, 4499416656998240,18657442342135966, 66490911199244672,164256548772296153] |