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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 12496 |
| 7 | 177727 |
| 8 | 1296928 |
| 9 | 6558084 |
| 10 | 26009280 |
| 11 | 88083342 |
| 12 | 257495424 |
| 13 | 687681996 |
| 14 | 1660685328 |
| 15 | 3779954365 |
| 16 | 8028883168 |
[0,0,0,0,0,12496,177727,1296928,6558084,26009280, 88083342,257495424,687681996,1660685328, 3779954365,8028883168] |