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A012653 as a simple table

n a(n)
0 0
1 0
2 2
3 -3
4 0
5 -10
6 -80
7 1764
8 -7392
9 17856
10 -41792
11 -7382320
12 134784320
13 -1068379104
14 7660192384
15 35293839840
16 -4466084847616
17 93476460710912
18 -1176630882269184
19 10358160914068992
20 214589448557477888

[0,0,2,-3,0,-10,-80,1764,-7392,17856,-41792,
 -7382320,134784320,-1068379104,7660192384,
 35293839840,-4466084847616,93476460710912,
 -1176630882269184,10358160914068992,
 214589448557477888]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)