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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 37 |
| 4 | 141 |
| 5 | 569 |
| 6 | 2262 |
| 7 | 8968 |
| 8 | 35667 |
| 9 | 141839 |
| 10 | 563967 |
| 11 | 2242515 |
| 12 | 8917145 |
| 13 | 35457932 |
| 14 | 140994125 |
| 15 | 560646436 |
| 16 | 2229344056 |
| 17 | 8864721595 |
| 18 | 35249512434 |
| 19 | 140165500184 |
| 20 | 557351464922 |
| 21 | 2216241907025 |
| 22 | 8812622737321 |
| 23 | 35042347707650 |
| 24 | 139341733946132 |
[1,12,37,141,569,2262,8968,35667,141839,563967, 2242515,8917145,35457932,140994125,560646436, 2229344056,8864721595,35249512434,140165500184, 557351464922,2216241907025,8812622737321, 35042347707650,139341733946132] |