A009146 - OEIS

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A009146 as a simple table

n	a(n)
0	1
1	1
2	-15
3	177
4	1057
5	-245471
6	15691665
7	-608056239
8	-20287425215
9	8821231566145
10	-1376333505095631
11	139148719952772849
12	-994319439549289631
13	-4366129925254794998687
14	1524646116370009191174609

[1,1,-15,177,1057,-245471,15691665,-608056239, -20287425215,8821231566145,-1376333505095631, 139148719952772849,-994319439549289631, -4366129925254794998687,1524646116370009191174609]