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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 2 |
| 7 | 6 |
| 8 | 24 |
| 9 | 89 |
| 10 | 371 |
| 11 | 1478 |
| 12 | 6044 |
| 13 | 24302 |
| 14 | 98000 |
| 15 | 392528 |
| 16 | 1570490 |
| 17 | 6264309 |
| 18 | 24954223 |
| 19 | 99253318 |
| 20 | 394409402 |
| 21 | 1565986466 |
| 22 | 6214173156 |
| 23 | 24647935156 |
| 24 | 97732340680 |
| 25 | 387428854374 |
| 26 | 1535588541762 |
| 27 | 6085702368796 |
| 28 | 24116801236744 |
| 29 | 95569050564444 |
| 30 | 378718095630676 |
[1,2,6,24,89,371,1478,6044,24302,98000,392528, 1570490,6264309,24954223,99253318,394409402, 1565986466,6214173156,24647935156,97732340680, 387428854374,1535588541762,6085702368796, 24116801236744,95569050564444,378718095630676] |