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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 7776 |
| 2 | 248832 |
| 3 | 1889568 |
| 4 | 7962624 |
| 5 | 24300000 |
| 6 | 60466176 |
| 7 | 130691232 |
| 8 | 254803968 |
| 9 | 459165024 |
| 10 | 777600000 |
| 11 | 1252332576 |
| 12 | 1934917632 |
| 13 | 2887174368 |
| 14 | 4182119424 |
| 15 | 5904900000 |
| 16 | 8153726976 |
| 17 | 11040808032 |
| 18 | 14693280768 |
[0,7776,248832,1889568,7962624,24300000,60466176, 130691232,254803968,459165024,777600000, 1252332576,1934917632,2887174368,4182119424, 5904900000,8153726976,11040808032,14693280768] |