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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 16 |
| 4 | 20 |
| 5 | 288 |
| 6 | 392 |
| 7 | 8192 |
| 8 | 11664 |
| 9 | 320000 |
| 10 | 468512 |
| 11 | 15925248 |
| 12 | 23762752 |
| 13 | 963780608 |
| 14 | 1458000000 |
| 15 | 68719476736 |
| 16 | 105046700288 |
| 17 | 5642219814912 |
| 18 | 8695584276992 |
| 19 | 524288000000000 |
| 20 | 813342767698944 |
| 21 | 54394721876836352 |
| 22 | 84841494965553152 |
| 23 | 6232805962420322304 |
[1,2,2,16,20,288,392,8192,11664,320000,468512, 15925248,23762752,963780608,1458000000, 68719476736,105046700288,5642219814912, 8695584276992,524288000000000,813342767698944, 54394721876836352,84841494965553152, 6232805962420322304] |