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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 1 |
| 12 | 7 |
| 13 | 21 |
| 14 | 93 |
| 15 | 319 |
| 16 | 1170 |
| 17 | 3931 |
| 18 | 13168 |
| 19 | 42365 |
| 20 | 134372 |
| 21 | 416765 |
| 22 | 1275718 |
| 23 | 3850137 |
| 24 | 11501014 |
| 25 | 34025545 |
| 26 | 99891325 |
| 27 | 291245242 |
| 28 | 844287970 |
| 29 | 2435145974 |
| 30 | 6993264128 |
| 31 | 20007298353 |
| 32 | 57051831889 |
| 33 | 162217819731 |
| 34 | 460079126428 |
| 35 | 1301975691316 |
| 36 | 3677269460008 |
| 37 | 10368105592318 |
[1,1,7,21,93,319,1170,3931,13168,42365,134372, 416765,1275718,3850137,11501014,34025545,99891325, 291245242,844287970,2435145974,6993264128, 20007298353,57051831889,162217819731,460079126428, 1301975691316,3677269460008,10368105592318] |