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A111882 as a simple table

n a(n)
0 1
1 1
2 0
3 4
4 4
5 36
6 256
7 400
8 17424
9 784
10 1478656
11 876096
12 154753600
13 560363584
14 19057250304
15 220388935936
16 2564046397696
17 83038749753600
18 327933273309184
19 33173161139160064
20 26222822450021376
21 14475245839622726656

[1,1,0,4,4,36,256,400,17424,784,1478656,876096,
 154753600,560363584,19057250304,220388935936,
 2564046397696,83038749753600,327933273309184,
 33173161139160064,26222822450021376,
 14475245839622726656]

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Last modified September 15 10:23 EDT 2024. Contains 375932 sequences. (Running on oeis4.)