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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 490 |
| 4 | 60916 |
| 5 | 15745548 |
| 6 | 7477647372 |
| 7 | 5799397213200 |
| 8 | 6925325038489152 |
| 9 | 11958227405868674880 |
| 10 | 28853103567727115409600 |
| 11 | 93561657023119005869616000 |
| 12 | 398720531811315564754326938880 |
| 13 | 2174628314166392755825875267321600 |
| 14 | 14941853448103858870808931238617312000 |
[1,11,490,60916,15745548,7477647372,5799397213200, 6925325038489152,11958227405868674880, 28853103567727115409600, 93561657023119005869616000, 398720531811315564754326938880, 2174628314166392755825875267321600, 14941853448103858870808931238617312000] |