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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 479001600 |
| 2 | 402910665227270323200 |
| 3 | 1193980357099103775859825737292800 |
| 4 | 6221349234739584150822122029143772173312614400 |
| 5 | 44698730304001991182769831137859339764690493418024756096000 |
| 6 | 395245742455869432937361185087176756463979731526578123254618890928614400 |
[1,479001600,402910665227270323200, 1193980357099103775859825737292800, 6221349234739584150822122029143772173312614400, 44698730304001991182769831137859339764690493418024\ 756096000, 39524574245586943293736118508717675646397973152657\ 8123254618890928614400] |