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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 115 |
| 4 | 2484 |
| 5 | 72005 |
| 6 | 2626846 |
| 7 | 115688349 |
| 8 | 5974568552 |
| 9 | 354154378249 |
| 10 | 23704428986010 |
| 11 | 1768459611322481 |
| 12 | 145525743200753356 |
| 13 | 13095070459815108141 |
| 14 | 1279226572751177845718 |
| 15 | 134827003107939467441845 |
| 16 | 15250595677663579282034256 |
| 17 | 1842758049329907303778372625 |
[1,1,8,115,2484,72005,2626846,115688349, 5974568552,354154378249,23704428986010, 1768459611322481,145525743200753356, 13095070459815108141,1279226572751177845718, 134827003107939467441845, 15250595677663579282034256, 1842758049329907303778372625] |