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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 0 |
| 5 | 5 |
| 6 | 1 |
| 7 | 0 |
| 8 | 34 |
| 9 | 37 |
| 10 | 53 |
| 11 | 343 |
| 12 | 609 |
| 13 | 1115 |
| 14 | 4177 |
| 15 | 9538 |
| 16 | 20872 |
| 17 | 62491 |
| 18 | 158530 |
| 19 | 382026 |
| 20 | 1046691 |
| 21 | 2750236 |
| 22 | 7006939 |
| 23 | 18758519 |
| 24 | 49936954 |
| 25 | 131014469 |
| 26 | 349912970 |
| 27 | 936906663 |
| 28 | 2495965135 |
| 29 | 6693664776 |
| 30 | 18007827939 |
| 31 | 48403762310 |
[0,0,5,1,0,34,37,53,343,609,1115,4177,9538,20872, 62491,158530,382026,1046691,2750236,7006939, 18758519,49936954,131014469,349912970,936906663, 2495965135,6693664776,18007827939,48403762310] |