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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | 1 |
| 2 | 2198 |
| 3 | 422151 |
| 4 | 614552 |
| 5 | 2508952 |
| 6 | 6635624 |
| 7 | 199148648 |
| 8 | 884736744 |
| 9 | 24591257752 |
| 10 | 30197683487 |
| 11 | 147197952744 |
| 12 | 545518122090 |
| 13 | 70292286279654 |
| 14 | 39660184000219160 |
| 15 | 45116546012289600 |
| 16 | 262537412640768744 |
[-1,1,2198,422151,614552,2508952,6635624, 199148648,884736744,24591257752,30197683487, 147197952744,545518122090,70292286279654, 39660184000219160,45116546012289600, 262537412640768744] |