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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 192 |
| 4 | 100352 |
| 5 | 557568000 |
| 6 | 32565539635200 |
| 7 | 19872369301840986112 |
| 8 | 126231322912498539682594816 |
| 9 | 8326627661691818545121844900397056 |
| 10 | 5694319004079097795957215725765328371712000 |
| 11 | 40325021721404118513276859513497679249183623593590784 |
| 12 | 2954540993952788006228764987084443226815814190099484786032640000 |
[1,4,192,100352,557568000,32565539635200, 19872369301840986112,126231322912498539682594816, 8326627661691818545121844900397056, 5694319004079097795957215725765328371712000, 40325021721404118513276859513497679249183623593590\ 784, 29545409939527880062287649870844432268158141900994\ 84786032640000] |