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A012710 as a simple table

n a(n)
0 0
1 1
2 2
3 4
4 0
5 -60
6 -680
7 -5504
8 -45696
9 -356080
10 -2998112
11 -23985216
12 -210124288
13 -1616818112
14 -13420660864
15 -52229820928
16 283969097728
17 28575615328512
18 648822348255744
19 17074162547880960
20 350789663754797056

[0,1,2,4,0,-60,-680,-5504,-45696,-356080,-2998112,
 -23985216,-210124288,-1616818112,-13420660864,
 -52229820928,283969097728,28575615328512,
 648822348255744,17074162547880960,
 350789663754797056]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)