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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 0 |
| 12 | 1 |
| 13 | 1 |
| 14 | 3 |
| 15 | 4 |
| 16 | 12 |
| 17 | 23 |
| 18 | 71 |
| 19 | 187 |
| 20 | 627 |
| 21 | 1970 |
| 22 | 6833 |
| 23 | 23384 |
| 24 | 82625 |
| 25 | 292164 |
| 26 | 1045329 |
| 27 | 3750277 |
| 28 | 13532724 |
| 29 | 48977625 |
| 30 | 177919099 |
| 31 | 648145255 |
| 32 | 2368046117 |
| 33 | 8674199554 |
| 34 | 31854078139 |
| 35 | 117252592450 |
| 36 | 432576302286 |
| 37 | 1599320144703 |
| 38 | 5925181102878 |
[1,0,1,1,3,4,12,23,71,187,627,1970,6833,23384, 82625,292164,1045329,3750277,13532724,48977625, 177919099,648145255,2368046117,8674199554, 31854078139,117252592450,432576302286, 1599320144703,5925181102878] |