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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 32 |
| 3 | 3080 |
| 4 | 6720 |
| 5 | 637032 |
| 6 | 60383960 |
| 7 | 131735240 |
| 8 | 12487111096 |
| 9 | 1183646396800 |
| 10 | 2582274191000 |
| 11 | 244772352350624 |
| 12 | 23201836730467360 |
| 13 | 50617738823727040 |
| 14 | 4798027663264052544 |
| 15 | 454802404774267597320 |
| 16 | 992208919004971638880 |
| 17 | 94050938500074310327912 |
[0,32,3080,6720,637032,60383960,131735240, 12487111096,1183646396800,2582274191000, 244772352350624,23201836730467360, 50617738823727040,4798027663264052544, 454802404774267597320,992208919004971638880, 94050938500074310327912] |