| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 60 |
| 3 | 7512 |
| 4 | 1546042 |
| 5 | 541742985 |
| 6 | 267920998650 |
| 7 | 180675370176420 |
| 8 | 160654598650809964 |
| 9 | 178879511446386682365 |
| 10 | 243695196628845859469020 |
| 11 | 400544315906804782687318938 |
| 12 | 777083567062772102871149374020 |
| 13 | 1755895011129198763056241198051342 |
[1,1,60,7512,1546042,541742985,267920998650, 180675370176420,160654598650809964, 178879511446386682365,243695196628845859469020, 400544315906804782687318938, 777083567062772102871149374020, 1755895011129198763056241198051342] |