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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 48 |
| 3 | 278 |
| 4 | 1634 |
| 5 | 9507 |
| 6 | 55643 |
| 7 | 325134 |
| 8 | 1900380 |
| 9 | 11107738 |
| 10 | 64922149 |
| 11 | 379465246 |
| 12 | 2217922765 |
| 13 | 12963500193 |
| 14 | 75770103923 |
| 15 | 442867155601 |
| 16 | 2588505603384 |
| 17 | 15129505035474 |
| 18 | 88430145882513 |
| 19 | 516863613785631 |
| 20 | 3021005935526290 |
[8,48,278,1634,9507,55643,325134,1900380,11107738, 64922149,379465246,2217922765,12963500193, 75770103923,442867155601,2588505603384, 15129505035474,88430145882513,516863613785631, 3021005935526290] |