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| n | a(n) |
|---|---|
| 1 | 262144 |
| 2 | 4096000 |
| 3 | 64000000 |
| 4 | 1000000000 |
| 5 | 8000000000 |
| 6 | 64000000000 |
| 7 | 512000000000 |
| 8 | 2744000000000 |
| 9 | 14706125000000 |
| 10 | 78815638671875 |
| 11 | 322828856000000 |
| 12 | 1322306994176000 |
| 13 | 5416169448144896 |
| 14 | 18279571887489024 |
| 15 | 61693555120275456 |
[262144,4096000,64000000,1000000000,8000000000, 64000000000,512000000000,2744000000000, 14706125000000,78815638671875,322828856000000, 1322306994176000,5416169448144896, 18279571887489024,61693555120275456] |