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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -1 |
| 3 | 4 |
| 4 | 0 |
| 5 | -4 |
| 6 | 13 |
| 7 | 57 |
| 8 | -57 |
| 9 | -13 |
| 10 | 40 |
| 11 | 688 |
| 12 | 0 |
| 13 | -688 |
| 14 | -40 |
| 15 | 121 |
| 16 | 6115 |
| 17 | 11770 |
| 18 | -11770 |
| 19 | -6115 |
| 20 | -121 |
| 21 | 364 |
| 22 | 48464 |
| 23 | 270620 |
| 24 | 0 |
| 25 | -270620 |
| 26 | -48464 |
| 27 | -364 |
| 28 | 1093 |
| 29 | 363965 |
| 30 | 4401033 |
| 31 | 5613265 |
| 32 | -5613265 |
| 33 | -4401033 |
| 34 | -363965 |
| 35 | -1093 |
| 36 | 3280 |
| 37 | 2657568 |
| 38 | 61590368 |
| 39 | 199134880 |
| 40 | 0 |
| 41 | -199134880 |
| 42 | -61590368 |
| 43 | -2657568 |
| 44 | -3280 |
[0,1,-1,4,0,-4,13,57,-57,-13,40,688,0,-688,-40, 121,6115,11770,-11770,-6115,-121,364,48464,270620, 0,-270620,-48464,-364,1093,363965,4401033,5613265, -5613265,-4401033,-363965,-1093,3280,2657568, 61590368,199134880,0,-199134880,-61590368, -2657568,-3280] |