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| n | a(n) |
|---|---|
| 1 | 157464 |
| 2 | 2099520 |
| 3 | 27993600 |
| 4 | 373248000 |
| 5 | 2592000000 |
| 6 | 18000000000 |
| 7 | 125000000000 |
| 8 | 590625000000 |
| 9 | 2790703125000 |
| 10 | 13186072265625 |
| 11 | 48243443062500 |
| 12 | 176506677018000 |
| 13 | 645779095649856 |
| 14 | 1968088672456704 |
| 15 | 5997984525582336 |
[157464,2099520,27993600,373248000,2592000000, 18000000000,125000000000,590625000000, 2790703125000,13186072265625,48243443062500, 176506677018000,645779095649856,1968088672456704, 5997984525582336] |