A012783 - OEIS

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A012783 as a simple table

n	a(n)
0	1
1	3
2	5
3	-889
4	-82167
5	-7869301
6	-906141171
7	-128450716913
8	-22562588189167
9	-4955964959446253
10	-1381444138161821675
11	-495014642393801914473
12	-227710892670360844819175
13	-131704509800404485504904293

[1,3,5,-889,-82167,-7869301,-906141171, -128450716913,-22562588189167,-4955964959446253, -1381444138161821675,-495014642393801914473, -227710892670360844819175, -131704509800404485504904293]

[1,3,5,-889,-82167,-7869301,-906141171,
 -128450716913,-22562588189167,-4955964959446253,
 -1381444138161821675,-495014642393801914473,
 -227710892670360844819175,
 -131704509800404485504904293]