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A052708 as a simple table

n a(n)
0 0
1 0
2 1
3 2
4 5
5 16
6 56
7 204
8 768
9 2970
10 11726
11 47060
12 191412
13 787304
14 3269100
15 13684864
16 57691353
17 244713654
18 1043684478
19 4472828400
20 19252045120 

[0,0,1,2,5,16,56,204,768,2970,11726,47060,191412,
 787304,3269100,13684864,57691353,244713654,
 1043684478,4472828400,19252045120]

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)