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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 31 |
| 3 | 56 |
| 4 | 234 |
| 5 | 703 |
| 6 | 2494 |
| 7 | 9882 |
| 8 | 38855 |
| 9 | 158630 |
| 10 | 674410 |
| 11 | 2921913 |
| 12 | 12955678 |
| 13 | 58544796 |
| 14 | 267600375 |
| 15 | 1235405800 |
| 16 | 5748447218 |
| 17 | 26880477835 |
| 18 | 126178539898 |
| 19 | 594019756766 |
| 20 | 2801839213779 |
| 21 | 13234169550602 |
| 22 | 62575594084426 |
| 23 | 296088878641741 |
[8,31,56,234,703,2494,9882,38855,158630,674410, 2921913,12955678,58544796,267600375,1235405800, 5748447218,26880477835,126178539898,594019756766, 2801839213779,13234169550602,62575594084426, 296088878641741] |