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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 12 |
| 4 | 48 |
| 5 | 288 |
| 6 | 2592 |
| 7 | 36288 |
| 8 | 798336 |
| 9 | 27941760 |
| 10 | 1564738560 |
| 11 | 140826470400 |
| 12 | 20419838208000 |
| 13 | 4778242140672000 |
| 14 | 1806175529174016000 |
| 15 | 1103573248325323776000 |
| 16 | 1090330369345419890688000 |
[1,2,4,12,48,288,2592,36288,798336,27941760, 1564738560,140826470400,20419838208000, 4778242140672000,1806175529174016000, 1103573248325323776000,1090330369345419890688000] |