| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3960 |
| 2 | 2728530 |
| 3 | 741411000 |
| 4 | 108232704450 |
| 5 | 9895238227512 |
| 6 | 622151742539730 |
| 7 | 28667818823003640 |
| 8 | 1013959920387067650 |
| 9 | 28517014529859428600 |
| 10 | 655766017908139664082 |
| 11 | 12611612824957135723320 |
| 12 | 206678780149079594319810 |
| 13 | 2932016343436265460360120 |
| 14 | 36493930411449362931569490 |
[1,3960,2728530,741411000,108232704450, 9895238227512,622151742539730,28667818823003640, 1013959920387067650,28517014529859428600, 655766017908139664082,12611612824957135723320, 206678780149079594319810, 2932016343436265460360120, 36493930411449362931569490] |