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| n | a(n) |
|---|---|
| 1 | 378 |
| 2 | 5133128 |
| 3 | 81705087744 |
| 4 | 983771662124160 |
| 5 | 13027612739061516288 |
| 6 | 180842352214339004973056 |
| 7 | 2505372582582745606695616512 |
| 8 | 35065654463193295271305370959872 |
| 9 | 495605164965018396615832445084368896 |
[378,5133128,81705087744,983771662124160, 13027612739061516288,180842352214339004973056, 2505372582582745606695616512, 35065654463193295271305370959872, 495605164965018396615832445084368896] |