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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 35 |
| 4 | 132 |
| 5 | 516 |
| 6 | 2086 |
| 7 | 8585 |
| 8 | 36040 |
| 9 | 153062 |
| 10 | 658558 |
| 11 | 2856372 |
| 12 | 12502898 |
| 13 | 55051180 |
| 14 | 244048234 |
| 15 | 1086807005 |
| 16 | 4865282682 |
| 17 | 21858557906 |
| 18 | 98615835998 |
| 19 | 446208697638 |
| 20 | 2025834611380 |
| 21 | 9219765801128 |
| 22 | 42078391465174 |
| 23 | 192434838953262 |
| 24 | 882143776302436 |
| 25 | 4050904714495496 |
| 26 | 18639979286877834 |
[1,3,10,35,132,516,2086,8585,36040,153062,658558, 2856372,12502898,55051180,244048234,1086807005, 4865282682,21858557906,98615835998,446208697638, 2025834611380,9219765801128,42078391465174, 192434838953262,882143776302436,4050904714495496, 18639979286877834] |