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| n | a(n) |
|---|---|
| 1 | 160 |
| 2 | 1120 |
| 3 | 8064 |
| 4 | 58720 |
| 5 | 428800 |
| 6 | 3137920 |
| 7 | 22953984 |
| 8 | 168075520 |
| 9 | 1229731840 |
| 10 | 9005086720 |
| 11 | 65887739904 |
| 12 | 482487224320 |
| 13 | 3530236641280 |
| 14 | 25851483627520 |
| 15 | 189148815949824 |
| 16 | 1385113412485120 |
| 17 | 10134527552389120 |
| 18 | 74213894381240320 |
[160,1120,8064,58720,428800,3137920,22953984, 168075520,1229731840,9005086720,65887739904, 482487224320,3530236641280,25851483627520, 189148815949824,1385113412485120, 10134527552389120,74213894381240320] |