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A055552 as a simple table

n a(n)
1 0
2 0
3 0
4 5
5 16
6 46
7 162
8 488
9 1282
10 3291
11 8607
12 22407
13 58892
14 156251
15 419489
16 1135860
17 3115246
18 8646507
19 24220195 

[0,0,0,5,16,46,162,488,1282,3291,8607,22407,58892,
 156251,419489,1135860,3115246,8646507,24220195]

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Last modified April 16 11:08 EDT 2024. Contains 371711 sequences. (Running on oeis4.)