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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 884 |
| 2 | 1887900 |
| 3 | 4549731788 |
| 4 | 11560065522460 |
| 5 | 30261639292482384 |
| 6 | 80752826621895569988 |
| 7 | 218391531192704847549000 |
| 8 | 596486567319455105649942300 |
| 9 | 1641564850552143323096960793200 |
| 10 | 4544894671462411776709731603900400 |
| 11 | 12644660098250754851503216626543200748 |
[1,884,1887900,4549731788,11560065522460, 30261639292482384,80752826621895569988, 218391531192704847549000, 596486567319455105649942300, 1641564850552143323096960793200, 4544894671462411776709731603900400, 12644660098250754851503216626543200748] |