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| n | a(n) |
|---|---|
| 1 | 120 |
| 2 | 7470 |
| 3 | 217144 |
| 4 | 4500818 |
| 5 | 85350934 |
| 6 | 1629022329 |
| 7 | 31770135236 |
| 8 | 629825651180 |
| 9 | 12620835427126 |
| 10 | 254719515611821 |
| 11 | 5165793380135728 |
| 12 | 105110696722615853 |
| 13 | 2143594088287821599 |
| 14 | 43784293043682987873 |
| 15 | 895295525455930993505 |
[120,7470,217144,4500818,85350934,1629022329, 31770135236,629825651180,12620835427126, 254719515611821,5165793380135728, 105110696722615853,2143594088287821599, 43784293043682987873,895295525455930993505] |