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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 0 |
| 5 | 5 |
| 6 | 3 |
| 7 | 4 |
| 8 | 24 |
| 9 | 36 |
| 10 | 87 |
| 11 | 255 |
| 12 | 530 |
| 13 | 1313 |
| 14 | 3575 |
| 15 | 8397 |
| 16 | 20589 |
| 17 | 54046 |
| 18 | 136731 |
| 19 | 347334 |
| 20 | 903694 |
| 21 | 2349517 |
| 22 | 6123754 |
| 23 | 16067398 |
| 24 | 42311690 |
| 25 | 111788610 |
| 26 | 296037502 |
| 27 | 785670359 |
| 28 | 2090272145 |
| 29 | 5569943701 |
| 30 | 14864225284 |
| 31 | 39738611650 |
[0,0,5,3,4,24,36,87,255,530,1313,3575,8397,20589, 54046,136731,347334,903694,2349517,6123754, 16067398,42311690,111788610,296037502,785670359, 2090272145,5569943701,14864225284,39738611650] |