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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1512 |
| 2 | 407792 |
| 3 | 43300152 |
| 4 | 2483540192 |
| 5 | 90082948872 |
| 6 | 2275573978832 |
| 7 | 42758452212312 |
| 8 | 627083562564032 |
| 9 | 7446552274621992 |
| 10 | 73703518023284912 |
| 11 | 622405155651823992 |
| 12 | 4571376289377014432 |
| 13 | 29672531569958345544 |
| 14 | 172523264372938765968 |
| 15 | 908873210563919696536 |
[1,1512,407792,43300152,2483540192,90082948872, 2275573978832,42758452212312,627083562564032, 7446552274621992,73703518023284912, 622405155651823992,4571376289377014432, 29672531569958345544,172523264372938765968, 908873210563919696536] |