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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 45 |
| 3 | 8176 |
| 4 | 5967927 |
| 5 | 12354550875 |
| 6 | 58745934381618 |
| 7 | 557269710685272585 |
| 8 | 9536970947556120868800 |
| 9 | 273107814151944184186060560 |
| 10 | 12345107536247705318429028256740 |
| 11 | 840776466106445249176017830108333910 |
| 12 | 83061829400676435859326576547506817501212 |
[1,2,45,8176,5967927,12354550875,58745934381618, 557269710685272585,9536970947556120868800, 273107814151944184186060560, 12345107536247705318429028256740, 840776466106445249176017830108333910, 83061829400676435859326576547506817501212] |