| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | -1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | -3 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | -12 |
| 14 | 16 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | -30 |
| 19 | 160 |
| 20 | -135 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | -60 |
| 25 | 960 |
| 26 | -2430 |
| 27 | 1536 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | -105 |
| 32 | 4480 |
| 33 | -25515 |
| 34 | 43008 |
| 35 | -21875 |
| 36 | 0 |
| 37 | 0 |
| 38 | 0 |
| 39 | -168 |
| 40 | 17920 |
| 41 | -204120 |
| 42 | 688128 |
| 43 | -875000 |
| 44 | 373248 |
| 45 | 0 |
| 46 | 0 |
| 47 | 0 |
| 48 | -252 |
| 49 | 64512 |
| 50 | -1377810 |
| 51 | 8257536 |
| 52 | -19687500 |
| 53 | 20155392 |
| 54 | -7411887 |
[0,0,-1,0,0,2,0,0,0,-3,0,0,0,-12,16,0,0,0,-30,160, -135,0,0,0,-60,960,-2430,1536,0,0,0,-105,4480, -25515,43008,-21875,0,0,0,-168,17920,-204120, 688128,-875000,373248,0,0,0,-252,64512,-1377810, 8257536,-19687500,20155392,-7411887] |