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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 33 |
| 3 | 1112 |
| 4 | 69908 |
| 5 | 6960472 |
| 6 | 1010678724 |
| 7 | 201542214592 |
| 8 | 52862893123648 |
| 9 | 17646889124736128 |
| 10 | 7306075691359891008 |
| 11 | 3673978840975236778496 |
| 12 | 2205779786212911066883328 |
| 13 | 1558502652244224074264296960 |
[2,33,1112,69908,6960472,1010678724,201542214592, 52862893123648,17646889124736128, 7306075691359891008,3673978840975236778496, 2205779786212911066883328, 1558502652244224074264296960] |