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| n | a(n) |
|---|---|
| 1 | 48 |
| 2 | 306 |
| 3 | 1016 |
| 4 | 2722 |
| 5 | 6868 |
| 6 | 17054 |
| 7 | 41920 |
| 8 | 105654 |
| 9 | 267306 |
| 10 | 699930 |
| 11 | 1842080 |
| 12 | 5008110 |
| 13 | 13630092 |
| 14 | 38145758 |
| 15 | 106346040 |
| 16 | 303695658 |
| 17 | 860469558 |
| 18 | 2491030532 |
| 19 | 7134136098 |
| 20 | 20845113942 |
| 21 | 60132267140 |
| 22 | 176824000698 |
| 23 | 512627653118 |
| 24 | 1514185540302 |
[48,306,1016,2722,6868,17054,41920,105654,267306, 699930,1842080,5008110,13630092,38145758, 106346040,303695658,860469558,2491030532, 7134136098,20845113942,60132267140,176824000698, 512627653118,1514185540302] |