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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 88 |
| 3 | 354 |
| 4 | 1617 |
| 5 | 7722 |
| 6 | 36667 |
| 7 | 173524 |
| 8 | 822065 |
| 9 | 3897261 |
| 10 | 18474589 |
| 11 | 87565905 |
| 12 | 415072759 |
| 13 | 1967506932 |
| 14 | 9326121377 |
| 15 | 44206712718 |
| 16 | 209544659717 |
| 17 | 993262158136 |
| 18 | 4708160655145 |
| 19 | 22317159667937 |
| 20 | 105785574659767 |
| 21 | 501434203894082 |
[8,88,354,1617,7722,36667,173524,822065,3897261, 18474589,87565905,415072759,1967506932,9326121377, 44206712718,209544659717,993262158136, 4708160655145,22317159667937,105785574659767, 501434203894082] |