A015273 - OEIS

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A015273 as a simple table

n	a(n)
3	1
4	-185
5	41107
6	-8838005
7	1910490043
8	-412612541285
9	89126228045659
10	-19251196169490725
11	4158260859792814555
12	-898184256176675135525
13	194007802557550502202331
14	-41905685236388916561230885

[1,-185,41107,-8838005,1910490043,-412612541285, 89126228045659,-19251196169490725, 4158260859792814555,-898184256176675135525, 194007802557550502202331, -41905685236388916561230885]