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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 7 |
| 5 | 381 |
| 6 | 21853 |
| 7 | 1790135 |
| 8 | 250562543 |
| 9 | 66331467215 |
| 10 | 34507857686001 |
| 11 | 35645472109753873 |
| 12 | 73356936892660012513 |
| 13 | 301275024409580265134121 |
| 14 | 2471655539736293803311467943 |
| 15 | 40527712706903494712385171632959 |
| 16 | 1328579255614092966328511889576785109 |
[0,0,0,0,7,381,21853,1790135,250562543, 66331467215,34507857686001,35645472109753873, 73356936892660012513,301275024409580265134121, 2471655539736293803311467943, 40527712706903494712385171632959, 1328579255614092966328511889576785109] |