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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 8 |
| 3 | 512 |
| 4 | 32760 |
| 5 | 2096128 |
| 6 | 134119432 |
| 7 | 8581547520 |
| 8 | 549084921848 |
| 9 | 35132853450752 |
| 10 | 2247953535926280 |
| 11 | 143833893445831168 |
| 12 | 9203121226997268472 |
| 13 | 588855924634379351040 |
| 14 | 37677576055373281198088 |
| 15 | 2410776011619255617326592 |
[0,8,512,32760,2096128,134119432,8581547520, 549084921848,35132853450752,2247953535926280, 143833893445831168,9203121226997268472, 588855924634379351040,37677576055373281198088, 2410776011619255617326592] |