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| n | a(n) |
|---|---|
| 1 | 40000 |
| 2 | 1750000 |
| 3 | 76562500 |
| 4 | 1500625000 |
| 5 | 29412250000 |
| 6 | 345888060000 |
| 7 | 4067643585600 |
| 8 | 33470895790080 |
| 9 | 275417656786944 |
| 10 | 1738925256499200 |
| 11 | 10979183698560000 |
| 12 | 56483045388000000 |
| 13 | 290580293025000000 |
[40000,1750000,76562500,1500625000,29412250000, 345888060000,4067643585600,33470895790080, 275417656786944,1738925256499200, 10979183698560000,56483045388000000, 290580293025000000] |