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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 12 |
| 3 | 166 |
| 4 | 3481 |
| 5 | 88509 |
| 6 | 2783714 |
| 7 | 101530262 |
| 8 | 4232955454 |
| 9 | 198636188057 |
| 10 | 10408538943146 |
| 11 | 603033909983829 |
| 12 | 38103929980500423 |
| 13 | 2608648993698684772 |
| 14 | 193359775333060165517 |
| 15 | 15364574547397697984616 |
| 16 | 1301880431718317296701496 |
[0,12,166,3481,88509,2783714,101530262,4232955454, 198636188057,10408538943146,603033909983829, 38103929980500423,2608648993698684772, 193359775333060165517,15364574547397697984616, 1301880431718317296701496] |