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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 336 |
| 2 | 30900 |
| 3 | 1301610 |
| 4 | 32046856 |
| 5 | 530962446 |
| 6 | 6479344016 |
| 7 | 61951251333 |
| 8 | 485198553532 |
| 9 | 3217462615688 |
| 10 | 18528857431906 |
| 11 | 94529315562186 |
| 12 | 434088353496446 |
| 13 | 1817613939845670 |
| 14 | 7014049051387480 |
| 15 | 25167786776727516 |
[1,336,30900,1301610,32046856,530962446, 6479344016,61951251333,485198553532,3217462615688, 18528857431906,94529315562186,434088353496446, 1817613939845670,7014049051387480, 25167786776727516] |