The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1961256 |
| 5 | 4730523156632595024 |
| 6 | 14714642085645788453359573419196194379200 |
| 7 | 141671570521482692258866117076218807527442238234361038404229857860891009480 |
[1,1,0,1,1961256,4730523156632595024, 14714642085645788453359573419196194379200, 14167157052148269225886611707621880752744223823436\ 1038404229857860891009480] |