| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -26 |
| 2 | 299 |
| 3 | -1950 |
| 4 | 7475 |
| 5 | -13754 |
| 6 | -12220 |
| 7 | 132756 |
| 8 | -276575 |
| 9 | 0 |
| 10 | 1010100 |
| 11 | -1486030 |
| 12 | -519961 |
| 13 | 2486300 |
| 14 | 829725 |
| 15 | -2215486 |
| 16 | -11643060 |
| 17 | 18523050 |
| 18 | 16317925 |
| 19 | -42861650 |
| 20 | 0 |
| 21 | 11010090 |
| 22 | 59644221 |
| 23 | -5743400 |
| 24 | -138219900 |
[1,-26,299,-1950,7475,-13754,-12220,132756, -276575,0,1010100,-1486030,-519961,2486300,829725, -2215486,-11643060,18523050,16317925,-42861650,0, 11010090,59644221,-5743400,-138219900] |