A012767 - OEIS

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A012767 as a simple table

n	a(n)
0	1
1	3
2	-35
3	-1057
4	59865
5	5446683
6	-726781835
7	-133713611977
8	32440474082865
9	10034804733270963
10	-3854719922524818035
11	-1800259494456990656497
12	1004556790822666566963465

[1,3,-35,-1057,59865,5446683,-726781835, -133713611977,32440474082865,10034804733270963, -3854719922524818035,-1800259494456990656497, 1004556790822666566963465]