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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 288 |
| 3 | 6112 |
| 4 | 74248 |
| 5 | 631264 |
| 6 | 5006296 |
| 7 | 34825856 |
| 8 | 249438952 |
| 9 | 1579115104 |
[5,288,6112,74248,631264,5006296,34825856, 249438952,1579115104] |