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A166746 as a simple table

n a(n)
1 0
2 0
3 4
4 12
5 72
6 262
7 1396
8 6126
9 31186
10 144606
11 713078
12 3384796

[0,0,4,12,72,262,1396,6126,31186,144606,713078,
 3384796]

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Last modified April 18 10:56 EDT 2021. Contains 343087 sequences. (Running on oeis4.)