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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 48 |
| 3 | 512 |
| 4 | 3968 |
| 5 | 32768 |
| 6 | 261376 |
| 7 | 2097152 |
| 8 | 16773120 |
| 9 | 134217728 |
| 10 | 1073721344 |
| 11 | 8589934592 |
| 12 | 68719378432 |
| 13 | 549755813888 |
| 14 | 4398046052352 |
| 15 | 35184372088832 |
| 16 | 281474974613504 |
| 17 | 2251799813685248 |
| 18 | 18014398500044800 |
| 19 | 144115188075855872 |
[8,48,512,3968,32768,261376,2097152,16773120, 134217728,1073721344,8589934592,68719378432, 549755813888,4398046052352,35184372088832, 281474974613504,2251799813685248, 18014398500044800,144115188075855872] |