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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 144 |
| 3 | 96 |
| 4 | 72000 |
| 5 | 2400 |
| 6 | 3512320 |
| 7 | 27095040 |
| 8 | 870912000 |
| 9 | 24192000 |
| 10 | 103038566400 |
| 11 | 1873428480 |
| 12 | 12223042191360 |
| 13 | 35258775552000 |
| 14 | 99189522432000 |
| 15 | 1889324236800 |
| 16 | 25062074933575680 |
| 17 | 61426654248960 |
| 18 | 1101504369917952000 |
[1,144,96,72000,2400,3512320,27095040,870912000, 24192000,103038566400,1873428480,12223042191360, 35258775552000,99189522432000,1889324236800, 25062074933575680,61426654248960, 1101504369917952000] |