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A089354 as a simple table

n a(n)
0 1
1 0
2 1
3 4
4 19
5 96
6 508
7 2780
8 15607
9 89392
10 520337
11 3069232
12 18305876
13 110214144
14 668950744
15 4088824140
16 25146253311
17 155491812384
18 966142729939
19 6029139839684
20 37771401328459
21 237467581184384
22 1497754198565104

[1,0,1,4,19,96,508,2780,15607,89392,520337,
 3069232,18305876,110214144,668950744,4088824140,
 25146253311,155491812384,966142729939,
 6029139839684,37771401328459,237467581184384,
 1497754198565104]

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Last modified April 23 08:11 EDT 2024. Contains 371905 sequences. (Running on oeis4.)