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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1395 |
| 5 | 0 |
| 6 | 218736 |
| 7 | 2856960 |
| 8 | 22199100 |
| 9 | 214652928 |
| 10 | -965188224 |
| 11 | -23114520576 |
| 12 | -388281479124 |
| 13 | -6434704152576 |
| 14 | -62005137337360 |
| 15 | -663564097179648 |
| 16 | -3090024621305244 |
| 17 | 38787461083607040 |
| 18 | 1072769542858022912 |
| 19 | 20475246764375101440 |
| 20 | 256644649462305237252 |
[1,0,0,0,1395,0,218736,2856960,22199100,214652928, -965188224,-23114520576,-388281479124, -6434704152576,-62005137337360,-663564097179648, -3090024621305244,38787461083607040, 1072769542858022912,20475246764375101440, 256644649462305237252] |