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| n | a(n) |
|---|---|
| 0 | 6 |
| 1 | 120 |
| 2 | 3486 |
| 3 | 114960 |
| 4 | 3885078 |
| 5 | 131860680 |
| 6 | 4478696046 |
| 7 | 152139829920 |
| 8 | 5168252353446 |
| 9 | 175568305155480 |
| 10 | 5964153335910078 |
| 11 | 202605640528682160 |
| 12 | 6882627597903676086 |
| 13 | 233806732532369766120 |
| 14 | 7942546277594444747406 |
| 15 | 269812766700385236436800 |
| 16 | 9165691521504650726475078 |
| 17 | 311363698964277915773152440 |
[6,120,3486,114960,3885078,131860680,4478696046, 152139829920,5168252353446,175568305155480, 5964153335910078,202605640528682160, 6882627597903676086,233806732532369766120, 7942546277594444747406,269812766700385236436800, 9165691521504650726475078, 311363698964277915773152440] |