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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 47 |
| 3 | 1306 |
| 4 | 31451 |
| 5 | 729811 |
| 6 | 16928840 |
| 7 | 397222288 |
| 8 | 9450343019 |
| 9 | 227749730869 |
| 10 | 5549991941777 |
| 11 | 136518857557006 |
| 12 | 3384666013449308 |
| 13 | 84477567863100244 |
| 14 | 2120568396642137720 |
| 15 | 53494945450407470656 |
| 16 | 1355345188539405424235 |
| 17 | 34469856482096766083833 |
| 18 | 879619709716580703808739 |
[1,47,1306,31451,729811,16928840,397222288, 9450343019,227749730869,5549991941777, 136518857557006,3384666013449308, 84477567863100244,2120568396642137720, 53494945450407470656,1355345188539405424235, 34469856482096766083833,879619709716580703808739] |