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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 512 |
| 4 | 4091 |
| 5 | 32608 |
| 6 | 259106 |
| 7 | 2052904 |
| 8 | 16234706 |
| 9 | 128373416 |
| 10 | 1015004124 |
| 11 | 8024737888 |
| 12 | 63441430784 |
| 13 | 501536079048 |
| 14 | 3964832287906 |
| 15 | 31343315384096 |
| 16 | 247778886499164 |
| 17 | 1958768810680376 |
| 18 | 15484663643904612 |
| 19 | 122410935014171288 |
[8,64,512,4091,32608,259106,2052904,16234706, 128373416,1015004124,8024737888,63441430784, 501536079048,3964832287906,31343315384096, 247778886499164,1958768810680376, 15484663643904612,122410935014171288] |