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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | -4 |
| 6 | 31 |
| 7 | -144 |
| 8 | 379 |
| 9 | -5560 |
| 10 | 8572 |
| 11 | -263128 |
| 12 | 473485 |
| 13 | -15744416 |
| 14 | 47003477 |
| 15 | -1206879556 |
| 16 | 5944492012 |
| 17 | -119190424496 |
| 18 | 876847239971 |
| 19 | -15100821637664 |
| 20 | 149690044061351 |
| 21 | -2416631748015804 |
| 22 | 29675481449346820 |
| 23 | -477579212590451988 |
| 24 | 6840036862556737337 |
[1,0,1,0,4,-4,31,-144,379,-5560,8572,-263128, 473485,-15744416,47003477,-1206879556,5944492012, -119190424496,876847239971,-15100821637664, 149690044061351,-2416631748015804, 29675481449346820,-477579212590451988, 6840036862556737337] |