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| n | a(n) |
|---|---|
| 1 | 50 |
| 2 | 984 |
| 3 | 16060 |
| 4 | 263516 |
| 5 | 4357084 |
| 6 | 72105068 |
| 7 | 1193130640 |
| 8 | 19742052632 |
| 9 | 326659600368 |
| 10 | 5405039750704 |
| 11 | 89433956076272 |
| 12 | 1479810123371280 |
| 13 | 24485531969701600 |
| 14 | 405147434704078656 |
| 15 | 6703731985610244736 |
[50,984,16060,263516,4357084,72105068,1193130640, 19742052632,326659600368,5405039750704, 89433956076272,1479810123371280,24485531969701600, 405147434704078656,6703731985610244736] |