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| n | a(n) |
|---|---|
| 1 | 1253608 |
| 2 | 414522184 |
| 3 | 140051200968 |
| 4 | 47661128330328 |
| 5 | 16261866249456960 |
| 6 | 5553852092522802280 |
| 7 | 1897470416545860341536 |
| 8 | 648358115644067172499256 |
| 9 | 221552861024287017431767352 |
| 10 | 75709141973276719446226452336 |
[1253608,414522184,140051200968,47661128330328, 16261866249456960,5553852092522802280, 1897470416545860341536,648358115644067172499256, 221552861024287017431767352, 75709141973276719446226452336] |