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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 49 |
| 3 | 198 |
| 4 | 1059 |
| 5 | 5263 |
| 6 | 25529 |
| 7 | 127731 |
| 8 | 630988 |
| 9 | 3118368 |
| 10 | 15452696 |
| 11 | 76444609 |
| 12 | 378316752 |
| 13 | 1872559828 |
| 14 | 9266918261 |
| 15 | 45863407707 |
| 16 | 226985095214 |
| 17 | 1123365612319 |
| 18 | 5559672436516 |
| 19 | 27515436853783 |
| 20 | 136176807358073 |
| 21 | 673954171761877 |
[8,49,198,1059,5263,25529,127731,630988,3118368, 15452696,76444609,378316752,1872559828,9266918261, 45863407707,226985095214,1123365612319, 5559672436516,27515436853783,136176807358073, 673954171761877] |