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A230911 as a simple table

n a(n)
1 0
2 0
3 8
4 118
5 1506
6 20028
7 271450
8 3678640
9 49775880
10 673343864
11 9109364398
12 123240784402
13 1667327405972
14 22557246670250
15 305176478640952
16 4128726222060840
17 55857454913515424
18 755694397322454686

[0,0,8,118,1506,20028,271450,3678640,49775880,
 673343864,9109364398,123240784402,1667327405972,
 22557246670250,305176478640952,4128726222060840,
 55857454913515424,755694397322454686]

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Last modified November 29 04:38 EST 2021. Contains 349416 sequences. (Running on oeis4.)