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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 11 |
| 4 | 144 |
| 5 | 3627 |
| 6 | 149288 |
| 7 | 8170800 |
| 8 | 545671762 |
| 9 | 43063046307 |
| 10 | 3906934079662 |
| 11 | 401264673924438 |
| 12 | 45988979036528440 |
| 13 | 5821010056777072838 |
| 14 | 806331341176441101980 |
| 15 | 121343111865634574938768 |
| 16 | 19712546794881999409462482 |
| 17 | 3438378417666873290074260643 |
| 18 | 640914537597785062325259175158 |
| 19 | 127143593044349500804170430994988 |
| 20 | 26745717365173718867249062116990380 |
[2,11,144,3627,149288,8170800,545671762, 43063046307,3906934079662,401264673924438, 45988979036528440,5821010056777072838, 806331341176441101980,121343111865634574938768, 19712546794881999409462482, 3438378417666873290074260643, 640914537597785062325259175158, 127143593044349500804170430994988, 26745717365173718867249062116990380] |