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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 34 |
| 3 | 95 |
| 4 | 240 |
| 5 | 553 |
| 6 | 1212 |
| 7 | 2547 |
| 8 | 5195 |
| 9 | 10340 |
| 10 | 20184 |
| 11 | 38766 |
| 12 | 73451 |
| 13 | 137565 |
| 14 | 255080 |
| 15 | 468877 |
| 16 | 855288 |
| 17 | 1549583 |
| 18 | 2790510 |
| 19 | 4997895 |
| 20 | 8907481 |
| 21 | 15804634 |
| 22 | 27928464 |
| 23 | 49169100 |
| 24 | 86268325 |
| 25 | 150882993 |
| 26 | 263124862 |
[1,9,34,95,240,553,1212,2547,5195,10340,20184, 38766,73451,137565,255080,468877,855288,1549583, 2790510,4997895,8907481,15804634,27928464, 49169100,86268325,150882993,263124862] |