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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 32 |
| 5 | 436 |
| 6 | 11292 |
| 7 | 545784 |
| 8 | 49826744 |
| 9 | 8647819328 |
| 10 | 2876819527744 |
| 11 | 1848998498567936 |
| 12 | 2312324942899031040 |
| 13 | 5659406410382924819712 |
| 14 | 27230994319259100289485568 |
| 15 | 258465217554621196991878652416 |
| 16 | 4851552662579126853087143276476928 |
[0,1,4,32,436,11292,545784,49826744,8647819328, 2876819527744,1848998498567936, 2312324942899031040,5659406410382924819712, 27230994319259100289485568, 258465217554621196991878652416, 4851552662579126853087143276476928] |