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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 12 |
| 3 | 43 |
| 4 | 101 |
| 5 | 276 |
| 6 | 711 |
| 7 | 1873 |
| 8 | 4892 |
| 9 | 12819 |
| 10 | 33549 |
| 11 | 87844 |
| 12 | 229967 |
| 13 | 602073 |
| 14 | 1576236 |
| 15 | 4126651 |
| 16 | 10803701 |
| 17 | 28284468 |
| 18 | 74049687 |
| 19 | 193864609 |
| 20 | 507544124 |
| 21 | 1328767779 |
| 22 | 3478759197 |
| 23 | 9107509828 |
| 24 | 23843770271 |
| 25 | 62423801001 |
| 26 | 163427632716 |
| 27 | 427859097163 |
| 28 | 1120149658757 |
[9,12,43,101,276,711,1873,4892,12819,33549,87844, 229967,602073,1576236,4126651,10803701,28284468, 74049687,193864609,507544124,1328767779, 3478759197,9107509828,23843770271,62423801001, 163427632716,427859097163,1120149658757] |