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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 6 |
| 2 | 218 |
| 3 | 19894 |
| 4 | 3605042 |
| 5 | 1071814854 |
| 6 | 476307806154 |
| 7 | 295358490331254 |
| 8 | 243794366120035682 |
| 9 | 258411431296057056262 |
| 10 | 342099898262700954007226 |
| 11 | 553199120991918158454260406 |
| 12 | 1072989618644463063657069172626 |
[2,6,218,19894,3605042,1071814854,476307806154, 295358490331254,243794366120035682, 258411431296057056262,342099898262700954007226, 553199120991918158454260406, 1072989618644463063657069172626] |