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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | -526 |
| 3 | -27580 |
| 4 | 753196 |
| 5 | 90195784 |
| 6 | -1456296584 |
| 7 | -411116288464 |
| 8 | 1604494897040 |
| 9 | 2397070610726624 |
| 10 | 23132980709206816 |
| 11 | -16982988079517329856 |
| 12 | -421483965905763150656 |
| 13 | 141239833198257461763200 |
| 14 | 5933406168767097396742016 |
| 15 | -1344584547605247059948037376 |
[1,14,-526,-27580,753196,90195784,-1456296584, -411116288464,1604494897040,2397070610726624, 23132980709206816,-16982988079517329856, -421483965905763150656,141239833198257461763200, 5933406168767097396742016, -1344584547605247059948037376] |