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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 14 |
| 4 | 231 |
| 5 | 2973 |
| 6 | 35585 |
| 7 | 409849 |
| 8 | 4600247 |
| 9 | 50678212 |
| 10 | 550454756 |
| 11 | 5913771637 |
| 12 | 62981797962 |
| 13 | 665997804082 |
| 14 | 7001087934965 |
[0,0,0,14,231,2973,35585,409849,4600247,50678212, 550454756,5913771637,62981797962,665997804082, 7001087934965] |