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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 512 |
| 4 | 3968 |
| 5 | 32768 |
| 6 | 262144 |
| 7 | 2093824 |
| 8 | 16776064 |
| 9 | 134121152 |
| 10 | 1073741824 |
| 11 | 8589934592 |
| 12 | 68719450112 |
| 13 | 549755703296 |
| 14 | 4398040219648 |
| 15 | 35184371580928 |
| 16 | 281474867658752 |
| 17 | 2251799813685248 |
| 18 | 18014398509481984 |
| 19 | 144115184855048192 |
[8,64,512,3968,32768,262144,2093824,16776064, 134121152,1073741824,8589934592,68719450112, 549755703296,4398040219648,35184371580928, 281474867658752,2251799813685248, 18014398509481984,144115184855048192] |