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A002976 as a simple table

n a(n)
4 0
5 1
6 0
7 2
8 0
9 5
10 9
11 21
12 42
13 76
14 174
15 396
16 888
17 2023
18 4345
19 9921
20 22566 

[0,1,0,2,0,5,9,21,42,76,174,396,888,2023,4345,
 9921,22566]

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Last modified May 21 13:22 EDT 2024. Contains 372736 sequences. (Running on oeis4.)