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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 252 |
| 3 | 6104 |
| 4 | 153222 |
| 5 | 3935188 |
| 6 | 101884208 |
| 7 | 2646874462 |
| 8 | 68861880812 |
| 9 | 1792520780552 |
| 10 | 46671361129270 |
| 11 | 1215282911633348 |
| 12 | 31646146096635168 |
| 13 | 824083171352362894 |
| 14 | 21459718004443762012 |
| 15 | 558827923845866912376 |
[12,252,6104,153222,3935188,101884208,2646874462, 68861880812,1792520780552,46671361129270, 1215282911633348,31646146096635168, 824083171352362894,21459718004443762012, 558827923845866912376] |