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A319779 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 1
5 4
6 20
7 66
8 226
9 696
10 2156

[1,0,0,0,1,4,20,66,226,696,2156]

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Last modified September 18 18:09 EDT 2024. Contains 376002 sequences. (Running on oeis4.)