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A263785 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 5
6 66
7 392
8 3522
9 15699
10 104014
11 463811
12 2735525
13 12858073
14 74523350
15 369725340
16 2110660483
17 10653316753
18 59256398945
19 300481718854
20 1633653025795
21 8329842362903
22 44742563812167
23 229817730687508
24 1226116608834208

[0,0,0,1,5,66,392,3522,15699,104014,463811,
 2735525,12858073,74523350,369725340,2110660483,
 10653316753,59256398945,300481718854,
 1633653025795,8329842362903,44742563812167,
 229817730687508,1226116608834208]

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Last modified September 25 00:48 EDT 2020. Contains 337333 sequences. (Running on oeis4.)