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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 8 |
| 9 | 32 |
| 10 | 94 |
| 11 | 214 |
| 12 | 406 |
| 13 | 880 |
| 14 | 2074 |
| 15 | 5306 |
| 16 | 14210 |
| 17 | 36964 |
| 18 | 92980 |
| 19 | 234406 |
| 20 | 597498 |
| 21 | 1534998 |
| 22 | 3971724 |
| 23 | 10292662 |
| 24 | 26631740 |
| 25 | 68951396 |
| 26 | 179026062 |
| 27 | 466232040 |
| 28 | 1217413238 |
| 29 | 3186168982 |
| 30 | 8354182670 |
| 31 | 21938929228 |
[1,1,0,0,0,8,32,94,214,406,880,2074,5306,14210, 36964,92980,234406,597498,1534998,3971724, 10292662,26631740,68951396,179026062,466232040, 1217413238,3186168982,8354182670,21938929228] |