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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -30 |
| 2 | 10980 |
| 3 | -5822040 |
| 4 | 3623245710 |
| 5 | -2467207358280 |
| 6 | 1779938570782440 |
| 7 | -1336872265001920320 |
| 8 | 1034337566576031632100 |
| 9 | -818707881037376263396710 |
| 10 | 659829780447854309255690280 |
| 11 | -539628866179308154664183513160 |
| 12 | 446708428717281359928910138018680 |
| 13 | -373580804664955058627213489276760840 |
[1,-30,10980,-5822040,3623245710,-2467207358280, 1779938570782440,-1336872265001920320, 1034337566576031632100,-818707881037376263396710, 659829780447854309255690280, -539628866179308154664183513160, 446708428717281359928910138018680, -373580804664955058627213489276760840] |