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| n | a(n) |
|---|---|
| 1 | 490000 |
| 2 | 60025000 |
| 3 | 7353062500 |
| 4 | 345888060000 |
| 5 | 16270574342400 |
| 6 | 410018473428480 |
| 7 | 10332465530397696 |
| 8 | 167006381634183168 |
| 9 | 2699368454168838144 |
| 10 | 31245878471405875200 |
| 11 | 361679014193888160000 |
| 12 | 3225176243350261200000 |
[490000,60025000,7353062500,345888060000, 16270574342400,410018473428480,10332465530397696, 167006381634183168,2699368454168838144, 31245878471405875200,361679014193888160000, 3225176243350261200000] |