A012014 - OEIS

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A012014 as a simple table

n	a(n)
0	1
1	-1
2	1
3	-169
4	-1823
5	-365905
6	-17126303
7	-3688466617
8	-393996411839
9	-109259290725793
10	-20477152840654271
11	-7401734340295771849
12	-2112803982091750971359
13	-978357645904185043693297

[1,-1,1,-169,-1823,-365905,-17126303,-3688466617, -393996411839,-109259290725793,-20477152840654271, -7401734340295771849,-2112803982091750971359, -978357645904185043693297]