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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 29 |
| 4 | 112 |
| 5 | 261 |
| 6 | 846 |
| 7 | 1720 |
| 8 | 4193 |
| 9 | 8065 |
| 10 | 16693 |
| 11 | 29073 |
| 12 | 55954 |
| 13 | 90874 |
| 14 | 158301 |
| 15 | 249828 |
| 16 | 409302 |
| 17 | 611841 |
| 18 | 962288 |
| 19 | 1392970 |
| 20 | 2091478 |
| 21 | 2957586 |
| 22 | 4286258 |
| 23 | 5893598 |
| 24 | 8347259 |
| 25 | 11221370 |
| 26 | 15440747 |
| 27 | 20464931 |
| 28 | 27577548 |
| 29 | 35834857 |
| 30 | 47497364 |
| 31 | 60856456 |
| 32 | 79217039 |
[1,9,29,112,261,846,1720,4193,8065,16693,29073, 55954,90874,158301,249828,409302,611841,962288, 1392970,2091478,2957586,4286258,5893598,8347259, 11221370,15440747,20464931,27577548,35834857, 47497364,60856456,79217039] |