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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 780 |
| 3 | 2775 |
| 4 | 5050 |
| 5 | 474825 |
| 6 | 681528 |
| 7 | 1727011 |
| 8 | 5286126 |
| 9 | 5911641 |
| 10 | 6604795 |
| 11 | 17325441 |
| 12 | 21612025 |
| 13 | 27799696 |
| 14 | 45025305 |
| 15 | 386767578 |
| 16 | 1538599128 |
| 17 | 2086160121 |
| 18 | 3679490220 |
| 19 | 5718242211 |
| 20 | 7092226351 |
| 21 | 8019794628 |
| 22 | 16505718895 |
| 23 | 36604197735 |
| 24 | 55541611986 |
| 25 | 56693041356 |
| 26 | 89369984476 |
[1,780,2775,5050,474825,681528,1727011,5286126, 5911641,6604795,17325441,21612025,27799696, 45025305,386767578,1538599128,2086160121, 3679490220,5718242211,7092226351,8019794628, 16505718895,36604197735,55541611986,56693041356, 89369984476] |