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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 277 |
| 3 | 76729 |
| 4 | 3204336 |
| 5 | 133818624 |
| 6 | 7767356736 |
| 7 | 450847788304 |
| 8 | 24315232188224 |
| 9 | 1311374995519744 |
| 10 | 71269232804067408 |
[1,277,76729,3204336,133818624,7767356736, 450847788304,24315232188224,1311374995519744, 71269232804067408] |