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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | -6 |
| 3 | 4 |
| 4 | -1 |
| 5 | 22 |
| 6 | -80 |
| 7 | 139 |
| 8 | -140 |
| 9 | 84 |
| 10 | -28 |
| 11 | 4 |
| 12 | 140 |
| 13 | -851 |
| 14 | 2500 |
| 15 | -4536 |
| 16 | 5516 |
| 17 | -4616 |
| 18 | 2640 |
| 19 | -990 |
| 20 | 220 |
| 21 | -22 |
| 22 | 969 |
| 23 | -8420 |
| 24 | 35504 |
| 25 | -94584 |
| 26 | 175564 |
| 27 | -237600 |
| 28 | 239250 |
| 29 | -179960 |
| 30 | 100078 |
| 31 | -40040 |
| 32 | 10920 |
| 33 | -1820 |
| 34 | 140 |
| 35 | 7084 |
| 36 | -80776 |
| 37 | 448056 |
[1,4,-6,4,-1,22,-80,139,-140,84,-28,4,140,-851, 2500,-4536,5516,-4616,2640,-990,220,-22,969,-8420, 35504,-94584,175564,-237600,239250,-179960,100078, -40040,10920,-1820,140,7084,-80776,448056] |