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| n | a(n) |
|---|---|
| 1 | 2784 |
| 2 | 10888 |
| 3 | 29456 |
| 4 | 83436 |
| 5 | 233536 |
| 6 | 671080 |
| 7 | 1919288 |
| 8 | 5542856 |
| 9 | 15833748 |
| 10 | 45309424 |
| 11 | 129364012 |
| 12 | 371396844 |
| 13 | 1063000280 |
| 14 | 3048786056 |
| 15 | 8719902452 |
| 16 | 24994666460 |
| 17 | 71536549320 |
| 18 | 205067864500 |
| 19 | 587032939664 |
| 20 | 1682282732208 |
| 21 | 4816175986888 |
[2784,10888,29456,83436,233536,671080,1919288, 5542856,15833748,45309424,129364012,371396844, 1063000280,3048786056,8719902452,24994666460, 71536549320,205067864500,587032939664, 1682282732208,4816175986888] |