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A166997 as a simple table

n a(n)
0 1
1 0
2 12
3 56
4 5404
5 171664
6 193729840
7 36639136064
8 919064160383600
9 937227332865348224
10 699214061851483321467008
11 3577364560049979516493456896
12 93123865010226899737836259608990464 

[1,0,12,56,5404,171664,193729840,36639136064,
 919064160383600,937227332865348224,
 699214061851483321467008,
 3577364560049979516493456896,
 93123865010226899737836259608990464]

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Last modified August 30 00:57 EDT 2024. Contains 375520 sequences. (Running on oeis4.)