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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 1 |
| 4 | 5 |
| 5 | 30 |
| 6 | 1 |
| 7 | 4 |
| 8 | 11 |
| 9 | 140 |
| 10 | 1 |
| 11 | 3 |
| 12 | -6 |
| 13 | -29 |
| 14 | 630 |
| 15 | 1 |
| 16 | 2 |
| 17 | -21 |
| 18 | -120 |
| 19 | -365 |
| 20 | 2772 |
| 21 | 1 |
| 22 | 1 |
| 23 | -34 |
| 24 | -139 |
| 25 | -266 |
| 26 | -1409 |
| 27 | 12012 |
| 28 | 1 |
| 29 | 0 |
| 30 | -45 |
| 31 | -92 |
| 32 | 531 |
| 33 | 2520 |
| 34 | -155 |
| 35 | 51480 |
| 36 | 1 |
| 37 | -1 |
| 38 | -54 |
| 39 | 15 |
| 40 | 1654 |
| 41 | 6489 |
| 42 | 17380 |
| 43 | 29485 |
| 44 | 218790 |
| 45 | 1 |
| 46 | -2 |
| 47 | -61 |
| 48 | 176 |
| 49 | 2755 |
| 50 | 4828 |
| 51 | -9723 |
| 52 | -13104 |
| 53 | 170035 |
| 54 | 923780 |
[1,1,6,1,5,30,1,4,11,140,1,3,-6,-29,630,1,2,-21, -120,-365,2772,1,1,-34,-139,-266,-1409,12012,1,0, -45,-92,531,2520,-155,51480,1,-1,-54,15,1654,6489, 17380,29485,218790,1,-2,-61,176,2755,4828,-9723, -13104,170035,923780] |