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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | 3 |
| 5 | -5 |
| 6 | 2 |
| 7 | -14 |
| 8 | 33 |
| 9 | -25 |
| 10 | 6 |
| 11 | 85 |
| 12 | -261 |
| 13 | 292 |
| 14 | -140 |
| 15 | 24 |
| 16 | -621 |
| 17 | 2363 |
| 18 | -3516 |
| 19 | 2546 |
| 20 | -892 |
| 21 | 120 |
| 22 | 5236 |
| 23 | -23872 |
| 24 | 44537 |
| 25 | -43405 |
| 26 | 23228 |
| 27 | -6444 |
| 28 | 720 |
| 29 | -49680 |
| 30 | 264860 |
| 31 | -596396 |
| 32 | 733983 |
| 33 | -532095 |
| 34 | 226644 |
| 35 | -52356 |
| 36 | 5040 |
| 37 | 521721 |
| 38 | -3193029 |
| 39 | 8448004 |
| 40 | -12605668 |
| 41 | 11586756 |
| 42 | -6707208 |
| 43 | 2383248 |
| 44 | -474144 |
| 45 | 40320 |
| 46 | -5994155 |
| 47 | 41506739 |
| 48 | -126480376 |
| 49 | 222424796 |
| 50 | -248535142 |
| 51 | 182793154 |
| 52 | -88379152 |
| 53 | 27046632 |
| 54 | -4745376 |
| 55 | 362880 |
| 56 | 74701055 |
| 57 | -578419961 |
| 58 | 1998774636 |
| 59 | -4056699966 |
| 60 | 5351696394 |
| 61 | -4791391134 |
| 62 | 2945757656 |
| 63 | -1226765624 |
| 64 | 330797184 |
| 65 | -52079040 |
| 66 | 3628800 |
[1,-1,1,3,-5,2,-14,33,-25,6,85,-261,292,-140,24, -621,2363,-3516,2546,-892,120,5236,-23872,44537, -43405,23228,-6444,720,-49680,264860,-596396, 733983,-532095,226644,-52356,5040,521721,-3193029, 8448004,-12605668,11586756,-6707208,2383248, -474144,40320,-5994155,41506739,-126480376, 222424796,-248535142,182793154,-88379152,27046632, -4745376,362880,74701055,-578419961,1998774636, -4056699966,5351696394,-4791391134,2945757656, -1226765624,330797184,-52079040,3628800] |