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A228672 as a simple table

n a(n)
5 1
6 0
7 0
8 0
9 0
10 251
11 922
12 1582
13 2572
14 4002
15 756755
16 6029297
17 31742676
18 120956707
19 398182782
20 12794989968
21 166170816448
22 1418774022895
23 9698826682676
24 55499002033421
25 894582818429967
26 14637215156295242
27 177486208140377619
28 1730337098015002802

[1,0,0,0,0,251,922,1582,2572,4002,756755,6029297,
 31742676,120956707,398182782,12794989968,
 166170816448,1418774022895,9698826682676,
 55499002033421,894582818429967,14637215156295242,
 177486208140377619,1730337098015002802]

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Last modified August 2 08:47 EDT 2021. Contains 346422 sequences. (Running on oeis4.)