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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 9 |
| 11 | 54 |
| 12 | 246 |
| 13 | 945 |
| 14 | 3186 |
| 15 | 9729 |
| 16 | 27414 |
| 17 | 72315 |
| 18 | 180415 |
| 19 | 429156 |
| 20 | 979425 |
| 21 | 2155485 |
| 22 | 4593330 |
| 23 | 9510624 |
| 24 | 19188360 |
| 25 | 37815948 |
| 26 | 72950634 |
| 27 | 138002024 |
| 28 | 256405887 |
| 29 | 468550278 |
| 30 | 843138585 |
| 31 | 1495634373 |
| 32 | 2617905474 |
| 33 | 4525424256 |
| 34 | 7731765279 |
| 35 | 13065217956 |
| 36 | 21849902348 |
| 37 | 36184992984 |
[1,9,54,246,945,3186,9729,27414,72315,180415, 429156,979425,2155485,4593330,9510624,19188360, 37815948,72950634,138002024,256405887,468550278, 843138585,1495634373,2617905474,4525424256, 7731765279,13065217956,21849902348,36184992984] |