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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 5 |
| 4 | 319 |
| 5 | 14949 |
| 6 | 253072 |
| 7 | 2326567 |
| 8 | 14516200 |
| 9 | 69305994 |
| 10 | 271885024 |
| 11 | 917364452 |
| 12 | 2746402607 |
| 13 | 7459357270 |
[0,0,5,319,14949,253072,2326567,14516200,69305994, 271885024,917364452,2746402607,7459357270] |