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| n | a(n) |
|---|---|
| 1 | 1257600 |
| 2 | 29746116 |
| 3 | 358153488 |
| 4 | 4497848356 |
| 5 | 39749497116 |
| 6 | 360292859536 |
| 7 | 2681201402880 |
| 8 | 20280611560000 |
| 9 | 136546079823132 |
| 10 | 928066750499344 |
| 11 | 5889856685235160 |
| 12 | 37580052583485504 |
| 13 | 230454199018052812 |
[1257600,29746116,358153488,4497848356, 39749497116,360292859536,2681201402880, 20280611560000,136546079823132,928066750499344, 5889856685235160,37580052583485504, 230454199018052812] |