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A022563 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 8
6 32
7 126
8 619
9 3332
10 20910
11 157721
12 1590330
13 23074092
14 487448150
15 14466253437
16 585505737038

[0,0,1,3,8,32,126,619,3332,20910,157721,1590330,
 23074092,487448150,14466253437,585505737038]

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)