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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 49 |
| 3 | 54 |
| 4 | 116 |
| 5 | 253 |
| 6 | 541 |
| 7 | 1248 |
| 8 | 2831 |
| 9 | 6471 |
| 10 | 14788 |
| 11 | 33887 |
| 12 | 77571 |
| 13 | 177642 |
| 14 | 406875 |
| 15 | 931841 |
| 16 | 2134242 |
| 17 | 4888087 |
| 18 | 11195485 |
| 19 | 25641380 |
| 20 | 58727691 |
| 21 | 134506571 |
| 22 | 308066476 |
| 23 | 705578355 |
| 24 | 1616017727 |
| 25 | 3701237834 |
| 26 | 8477110559 |
| 27 | 19415506245 |
| 28 | 44468203154 |
[8,49,54,116,253,541,1248,2831,6471,14788,33887, 77571,177642,406875,931841,2134242,4888087, 11195485,25641380,58727691,134506571,308066476, 705578355,1616017727,3701237834,8477110559, 19415506245,44468203154] |