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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1040 |
| 3 | 88695 |
| 4 | 2097664 |
| 5 | 24415625 |
| 6 | 181402416 |
| 7 | 988671775 |
| 8 | 4294983680 |
| 9 | 15690559329 |
| 10 | 50000050000 |
| 11 | 142655915831 |
| 12 | 371504309760 |
| 13 | 896080382665 |
| 14 | 2024782853744 |
| 15 | 4324878309375 |
| 16 | 8796093546496 |
| 17 | 17135948863745 |
[0,1,1040,88695,2097664,24415625,181402416, 988671775,4294983680,15690559329,50000050000, 142655915831,371504309760,896080382665, 2024782853744,4324878309375,8796093546496, 17135948863745] |