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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 67 |
| 4 | 2602 |
| 5 | 127391 |
| 6 | 8670037 |
| 7 | 849052226 |
| 8 | 120598537031 |
| 9 | 24766028284955 |
| 10 | 7293869441425936 |
| 11 | 3051443919384918993 |
| 12 | 1796556570870581636365 |
| 13 | 1475927350935844025485280 |
| 14 | 1679181820016034990525166005 |
| 15 | 2628190444358197603661882875487 |
| 16 | 5626146387384970881514304524196922 |
[0,0,1,67,2602,127391,8670037,849052226, 120598537031,24766028284955,7293869441425936, 3051443919384918993,1796556570870581636365, 1475927350935844025485280, 1679181820016034990525166005, 2628190444358197603661882875487, 5626146387384970881514304524196922] |