A012560 - OEIS

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A012560 as a simple table

n	a(n)
0	2
1	-4
2	230
3	-7880
4	680458
5	-77968460
6	12944005230
7	-2852439671952
8	810954585734418
9	-288565474593329044
10	125662055644822916342
11	-65733137963856533872984
12	40670869816508001470654746

[2,-4,230,-7880,680458,-77968460,12944005230, -2852439671952,810954585734418, -288565474593329044,125662055644822916342, -65733137963856533872984, 40670869816508001470654746]