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| n | a(n) |
|---|---|
| 7 | 0 |
| 8 | 1 |
| 9 | 1 |
| 10 | 3 |
| 11 | 8 |
| 12 | 22 |
| 13 | 60 |
| 14 | 167 |
| 15 | 466 |
| 16 | 1307 |
| 17 | 3681 |
| 18 | 10418 |
| 19 | 29575 |
| 20 | 84219 |
| 21 | 240407 |
| 22 | 687802 |
| 23 | 1971576 |
| 24 | 5661335 |
| 25 | 16281377 |
| 26 | 46888590 |
| 27 | 135202932 |
| 28 | 390300559 |
| 29 | 1127877757 |
| 30 | 3262398334 |
| 31 | 9444747407 |
| 32 | 27364824226 |
| 33 | 79344643855 |
| 34 | 230219356666 |
| 35 | 668412171376 |
| 36 | 1941808202980 |
| 37 | 5644309042885 |
[0,1,1,3,8,22,60,167,466,1307,3681,10418,29575, 84219,240407,687802,1971576,5661335,16281377, 46888590,135202932,390300559,1127877757, 3262398334,9444747407,27364824226,79344643855, 230219356666,668412171376,1941808202980, 5644309042885] |