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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 248832 |
| 2 | 7962624 |
| 3 | 60466176 |
| 4 | 254803968 |
| 5 | 777600000 |
| 6 | 1934917632 |
| 7 | 4182119424 |
| 8 | 8153726976 |
| 9 | 14693280768 |
| 10 | 24883200000 |
| 11 | 40074642432 |
| 12 | 61917364224 |
| 13 | 92389579776 |
| 14 | 133827821568 |
| 15 | 188956800000 |
| 16 | 260919263232 |
[0,248832,7962624,60466176,254803968,777600000, 1934917632,4182119424,8153726976,14693280768, 24883200000,40074642432,61917364224,92389579776, 133827821568,188956800000,260919263232] |