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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 105 |
| 3 | 15400 |
| 4 | 2627625 |
| 5 | 488864376 |
| 6 | 96197645544 |
| 7 | 19688264481600 |
| 8 | 4148378852099625 |
| 9 | 893864677761055000 |
| 10 | 196056702961398759480 |
| 11 | 43627992869961630486720 |
| 12 | 9825387560922608865863400 |
| 13 | 2235197406895366368301560000 |
| 14 | 512889830640524227455318600000 |
[1,105,15400,2627625,488864376,96197645544, 19688264481600,4148378852099625, 893864677761055000,196056702961398759480, 43627992869961630486720,9825387560922608865863400, 2235197406895366368301560000, 512889830640524227455318600000] |